Anastasia Zherlitsyna — timeline

Metastatic GIST (initially diagnosed as uterine leiomyosarcoma), Kyiv, Ukraine · records 2022–2026 · updated 20 Oct 2026

Formulated diagnosis

ICD-10: C16.9 (malignant neoplasm of stomach, unspecified); ICD-O morphology 8936/3, gastrointestinal stromal tumour.

Diagnosis: Gastrointestinal stromal tumour (GIST) of the stomach, KIT exon 11 deletion (Q556_V559>H), with metastases to the liver (bilobar, dominant right-lobe mass) and peritoneum, stage IV. Initially (08/2022) diagnosed and treated as leiomyosarcoma of the uterine body T2NxM1; diagnosis revised 04–06/2023 on histology (DOG-1, CD117 positive; Israeli pathology revision of all samples). Concomitant: uterine leiomyomas; right ovarian endometrioma; type 2 diabetes; iron-deficiency anaemia.

08/2022 — liver-metastasis biopsy read as metastatic uterine leiomyosarcoma; bilobar liver masses, paragastric mass 51 × 46 mm, pelvic masses.
09/2022 – 01/2023 — status after 4 cycles gemcitabine + docetaxel + bevacizumab: progression in the liver (MRI 10/2022, CT 12/2022). Oncomine (12/2022): KIT exon 11 deletion (VAF 42.5 %), subclonal KIF5B–MET fusion, TMB low, MSS; germline panel negative.
05–12/01/2023 — pazopanib 800 mg, stopped on day 8: posterior reversible encephalopathy syndrome with left occipital haemorrhage, hospitalised 13–25/01/2023, resolved; CT 09/02/2023 with 12 % regression.
01/2023 — repeat liver biopsy: reported as metastasis of uterine leiomyosarcoma.
02–03/2023 — status after 3 cycles trabectedin: progression on PET-CT 11/04/2023.
04–06/2023 — EUS-FNA of the paragastric mass and liver core biopsy: GIST of the stomach, GIST metastasis in the liver (CSD, 21–26/04/2023); Israeli revision 04/06/2023 confirms GIST in all samples.
03/05/2023 — imatinib 400 mg/day started. 08/2023 — marked metabolic response (PET-CT). 03/2024 — stable. 05/2025 — stable, "PET negative", cystic residues.
06–09/2026 — PET-CT 19/06/2026: return of enhancing, FDG-active mural components in the known liver lesions after 3 years of imatinib (started 03.05.2023) (LISOD re-read 08/07/2026; Israeli expert reading 08/09/2026: metabolic progression, left-lobe lesion 42 × 36 mm, right-lobe mass ~15 × 10 cm, no bone lesions).
08/2026 — FoundationOne Liquid CDx (ctDNA fraction 32 %): KIT exon 11 Q556_V559>H (17.0 %) plus secondary KIT exon 13 V654A (8.8 %) and exon 18 A829P (4.0 %) — polyclonal imatinib resistance.
08/09/2026 — recommendation: sunitinib 50 mg 4/2 (regorafenib 160 mg d1–21 as an option); not yet started; imatinib continues. 10/09/2026 — thermal ablation of the left-lobe lesion judged contraindicated by Dr. O. Korshak (interventional radiology, Shalimov Centre, Kyiv): contact with the left portal branch and bile duct; other local options under discussion. 17/09/2026 — Dr. E. Tahover (GIST oncologist, Tel Aviv Sourasky): imatinib has failed, start a second-line TKI now (sunitinib or ripretinib; regorafenib an alternative); liver-directed interventional treatment first. 18/09/2026 — Dr. D. Fedorov (liver surgeon): two-stage liver resection feasible and potentially radical; fresh PET-CT, then workup.
23/09/2026 — PET-CT (KMKOC): further metabolic progression in multiple liver foci versus 19/06/2026, SUVmax up to 4.9; left-lobe active area confluent, up to 35 × 54 mm; active focus up to 15 × 24 mm in segment S8; gastric and uterine lesions stable; oesophageal uptake SUVmax 2.0–3.2 (endoscopy advised); no bone lesions.
30/09/2026 — regorafenib (Stivarga 40 mg tablets × 84 = one 21-day cycle at 160 mg/day) dispensed at LISOD; not yet started. Baseline blood tests the same day (results).

Current situation (as of 30 September 2026)

Status as of 20 October 2026 (latest first)

Pending: cytology of new ascitic fluid with a cell block and IHC (CD117/DOG-1), if fluid is available (the second laboratory read of the existing slides, which Dr Fedorov asked for, is done: CSD LAB, 14.10.2026; whether a new puncture is feasible is for the treating team); laparoscopy operation protocol (Shalimov Centre); oncology consilium (treating oncologists and surgeons) — OPINION held: surgery approved (Dr Fedorov, 16.10.2026); its written conclusion (due 19.10.2026) is not on file; imatinib: stopped 20.10.2026 before surgery; restart a few days after surgery — timing to be discussed with the surgeon/oncologist (family report, 20.10.2026); regorafenib: not started, held because surgery is expected soon (family report, 14.10.2026); not allowed currently (family report, 20.10.2026); timing for the treating oncologist; endoscopy for the oesophageal uptake advised on 23.09.2026 (status not documented) — EGD done on 02.10.2026 per the discharge summary of 13.10.2026[201] (erythematous gastropathy, duodeno-gastric bile reflux; the oesophagus is not described in the summary); family report 20.10.2026: she had a cold with a mild sore throat in those days; open for the treating team; nature of the colon neoplasias seen at colonoscopy on 02.10.2026 ("single (3)"; histology not stated in the summary — to request); genetics only on operative material, per the oncologist Dr O.M. Latsinnikova (opinion relayed in chat, 13.10.2026); whether a third Shalimov cytology slide exists; trial eligibility and tissue biobanking under consideration (living-tissue banking in Israel not pursued: family report, 20.10.2026, summary).

Suggestion by this site (not requested by a doctor): INTERPRETATION re-review of the liver trepan and gastric incisional biopsy blocks 4222/26 of 05.10.2026 (Shalimov; report 13.10.2026), where IHC on the gastric piece and mutational analysis were not performed. No date or owner.

Tags: FACT what a document or official written conclusion states (source, date, [n]) · COMMENTARY an explicitly labelled written commentary on results · OPINION a doctor's informal view (chat, teleconsultation, call), never upgraded to fact · INTERPRETATION inference by this site (incl. AI-assisted measurements) or by a doctor, not an official conclusion. Links: Original = the document in its original language · English translation.

Extent of the current progression. This is not a single small nodule, and it grew between June and September:

  • FACT PET-CT 23.09.2026 (KMKOC): FDG activity increased in multiple liver foci compared with 19.06.2026, SUVmax up to 4.9 — progression of the underlying disease.
  • FACT Left lobe (segments II/III): the active area is now confluent, up to 35 × 54 mm (June CT lesion 46 × 48 × 42 mm, 27 mL, expert reading 42 × 36 mm). On the June contrast CT it touches the left portal branch and the left hepatic duct.
  • FACT Right lobe: an active focus up to 15 × 24 mm in segment S8, inside the ametabolic area of the dominant mass (now 98 × 148 mm). In June the right-lobe activity was a plaque on the wall of that mass.
  • INTERPRETATION Own volumetry (analysis): FDG-active tissue in the left lobe 19 → 36 mL (2.2 → 3.4 × liver background); new 4 mL focus in S8; active wall of the right-lobe mass 6 → 10 mL.
  • FACT ctDNA tumour fraction 32 % (FoundationOne Liquid CDx, 20.08.2026) INTERPRETATION is high and points to a substantial amount of active tumour, carrying two resistance clones (KIT exon 13 V654A and exon 18 A829P).

Patient. Anastasia Zherlitsyna, born 25.04.1976 (50), Kyiv, Ukraine.

Diagnosis. Metastatic gastric GIST with bilobar liver metastases; treated as uterine leiomyosarcoma T2NxM1 from 28.09.2022 until the April–May 2023 biopsies established GIST (DOG-1 and CD117 positive; Israeli revision 04.06.2023 confirmed GIST in all three samples). Uterine leiomyomas and a right ovarian endometrioma are benign bystanders.

Molecular status (most important). Driver KIT exon 11 deletion Q556_V559>H (Oncomine, Dec 2022, VAF 42.5 %). FoundationOne Liquid CDx of 20.08.2026, ctDNA tumour fraction 32 %: exon 11 driver at VAF 17.0 % plus two new KIT resistance mutations — exon 13 V654A (8.8 %) and exon 18 A829P (4.0 %), in different kinase domains: polyclonal imatinib resistance. The report flags imatinib, sunitinib and avapritinib as resistant and lists regorafenib as NCCN category 1. Which drug covers which clone: drug table; every variant from both tests: genomic findings.

Sites of disease (PET-CT 23.09.2026, KMKOC). Multiple ametabolic liver lesions with metabolic activity growing along the contour and inside some of them, SUVmax up to 4.9; dominant right-lobe mass 98 × 148 mm (June ~144 × 104 mm); left-lobe active area up to 35 × 54 mm, confluent; active focus up to 15 × 24 mm in segment S8; calcified FDG-negative gastric lesion 43 × 32 mm, unchanged; uterine lesions stable; new mild–moderate oesophageal uptake (SUVmax 2.0–3.2, possibly inflammatory — endoscopy advised); no bone lesions. June 2026 (contrast CT, expert reading 08.09.2026): left-lobe lesion 42 × 36 mm (own measurement 46 × 48 × 42 mm, 27 mL), in contact with the left portal branch.

Treatment. Imatinib 400 mg/day since 03.05.2023, continuing; taken currently and continued until the operation (resumed 06.10.2026, the day after the laparoscopy; family report, 14.10.2026). Stopped on 20.10.2026 before the operation; restart planned a few days after the operation, timing to be discussed (family report, 20.10.2026). On 30.07.2026 and 08.09.2026 the LISOD oncologist recommended sunitinib 50 mg, 28 days on / 14 off (regorafenib 160 mg days 1–21 q28 as an alternative) — sunitinib was not started. Regorafenib (Stivarga 40 mg tablets × 84, one 21-day cycle at 160 mg/day) was dispensed at LISOD on 30.09.2026 and has not been started yet (as of 30.09.2026); not started; held because surgery is expected soon (family report, 14.10.2026); not allowed currently (family report, 20.10.2026); baseline blood tests the same day (results). On 17.09.2026 Dr. Tahover (Ichilov) urged starting a second-line TKI without further delay.

Safety context. PRES on pazopanib in January 2023 with left occipital haemorrhage and multifocal vasoconstriction, largely resolved by June 2023 — potent VEGFR inhibitors carry extra risk. Baseline echocardiogram 30.07.2026 normal (EF 67 %). Comorbidities on record: type 2 diabetes, iron-deficiency anaemia.

Open clinical question. Local treatment of the FDG-active left-lobe lesion: on 10.09.2026 Dr. Oleksandr Korshak (interventional radiology, Shalimov Centre of Surgery and Transplantology, Kyiv) judged thermal ablation (RFA/MWA) contraindicated because the lesion contacts the left portal branch and the accompanying left bile duct (imaging analysis); TARE, TACE/DEB-TACE, SBRT, IRE, resection of segments II–III and non-thermal histotripsy (HistoSonics, newly CE-approved; opinion to be requested from the manufacturer, as Dr. Korshak suggested) are under discussion, with imatinib continued — an approach NCCN and ESMO allow to be considered for limited progression on imatinib. The PET-CT of 23.09.2026 adds an active focus in segment S8 of the right lobe, which any local plan must cover as well; S8 lies within the part removed by a right hemihepatectomy, the first stage of the two-stage resection Dr. Fedorov proposed on 18.09.2026 (guideline basis, ablation opinion).

Which 3D model to use

This page has one 3D model to use and three older ones.

START HEREThree-date liver model — open. It shows the liver, the tumours and their PET-active (metabolically active) parts on 13.05.2025, 19.06.2026 and 23.09.2026. Switch dates with the buttons. Press Compare to see the earlier scan as an outline on the current one. Hover any part to see what the doctors' reports say about it. It is an AI-assisted reconstruction, not a radiology report. Less certain on 23.09.2026 (no contrast): liver segments, veins and the portal vein are estimated; the stomach and the gastric tumour were outlined by one reader only. It adds each tumour separately (R1, L1, S8, P7, S1), the stomach tumour, the veins, the active tissue and a comparison between dates.

Older 3D models (for reference):

Which numbers come from which model. The status volumes (L1 21 → 33 → 54 mL; S8 79 mL; R1 about 1.2 L) come from the three-date model. The active-tissue volumes in the 23.09.2026 and 19.06.2026 analyses (left lobe 19 → 36 mL, S8 focus 4.1 mL, mass wall 6 → 10 mL) come from the older single-scan analyses (active = SUV ≥ 3.24 in September, ≥ 1.65 in June). The three-date model uses other outlines and thresholds (SUV ≥ 2.54 in September, ≥ 2.12 in June) and gives larger values (left-lobe active tissue 22.7 → 42.8 mL; S8 active 10.8 mL). Both show an increase from June to September.

Liver 3D across three CTs: 13.05.2025 / 19.06.2026 / 23.09.2026

Interactive 3D liver viewer, three dates — open the viewer (full screen). It shows the liver, the dominant right-lobe mass, the left-lobe lesion and the smaller lesions with their cores, walls and FDG-active tissue, the hepatic and portal veins, IVC and Couinaud segments on each date. Switch dates, overlay the previous date, colour lesion surfaces by growth, cut through a lesion, see the per-lesion volume table, and show each radiologist's written statement on the model with links to the report and the original document. The same viewer is embedded, opened on the right date, in the 23.09.2026 and 19.06.2026 imaging sections; interface in English or Ukrainian (EN | УКР).

Method. The masks are the consensus of two independent AI segmentation teams with a chief-radiologist-level adjudication pass, checked against the written reports (order of authority: Israeli revision of 08.09.2026 highest, then the LISOD rereads, then the primary reports). Tissue defined only by PET, and inferred items, are labelled as such in the layer list and the lesion table. Caveats. The 23.09.2026 CT is non-contrast and thicker (3.27 mm slices), so the September segments, hepatic veins and portal vein are low-confidence (the September portal vein is transferred from June, not observed); Couinaud segments are inferred automatically on all dates, not vessel-guided. Dates are compared via spine-anchored or liver-anchored alignment (the patient breathed differently on each scan, so no single alignment fits both); volumes and sizes are measured on each date natively and do not depend on the alignment. This is an AI-assisted reconstruction, not a radiology report; the written reports are authoritative. Older single-scan models: see which 3D model to use; the three-date viewer is also embedded at 23.09.2026 · 19.06.2026.

Whole-body model of all lesions (PET-CT 23.09.2026)

Interactive whole-body model — skeleton and organs ghosted, lesions in colour from the reviewed 23.09.2026 segmentation (liver lesions and FDG-active tissue, gastric-wall lesion, uterine lesion, pelvic node); layers can be switched off. Open full screen. For the liver itself, use the three-date liver viewer above.

What you see: the 23.09.2026 PET-CT, lesions in colour (yellow = active tissue), organs and bones faint. Drag to turn; "layers & controls" switches parts off. Lesion outlines were checked by hand; organ shapes are automatic. The dotted orange line is a guessed bile-duct path and the red ball marks where the left lesion touched a portal-vein branch on the June scan — neither can be seen on this scan.

Source documents: all reports on this site · numbered document references · Google Drive folders: docs_eng · UKR_orig · anastasia_disks · 2026_new · Left_lobe_focus

Questions for the multidisciplinary tumour board

The consilium is announced for 15.10.2026 (informal, opinion); questions in order of dependency.

Terms: R1 — dominant right-lobe mass (1.2 L, fluid/necrotic, FDG-active wall plaques); S8 — dome lesion (79 mL, new 14 × 23 mm active focus); L1 — left-lobe lesion (54 mL, biopsy-proven viable GIST, 0–1 mm from the left portal branch); GF — calcified gastric primary.

Staging: ascitic cytology 05.10.2026 — category V reported [196]; AUS on review of the same slides [197]; malignancy not established; laparoscopic findings undocumented.

Supporting questions, data, consultants' statements and literature: see the collapsed block below

  1. Operate now? Does the unresolved cytology (category V; AUS on review) stop surgery, or is it settled by peritoneal inspection and frozen-section washings at the start of surgery? [alternatives within days: repeat tap with cell block at CSD if fluid reaccumulates; second-look laparoscopy. Note: frozen section applies to nodules; DOG1/CD117 on a cell block is a post-operative result] [Literature: see topic 4, similar cases]
    OPINION Dr Fedorov's position (16.10.2026, opinion): he considers the earlier category V finding over-diagnosis against the background of the cancer diagnosis ("they overdid it"; presumably the first report); malignant cells would have been on all slides.
  2. Order and staging. Right hemihepatectomy (R1 with the S8 lesion) first or L1 first; one stage or two; and how is R1 — the 1.2 L right-lobe mass with FDG-active wall plaques — handled: resection only, or is drainage/aspiration an option? [surgeon's order changed 18.09 [190] → 09.10 OPINION; remnant estimates in the collapsed block; no published GIST series on drainage] [Literature: see topic 1, topic 2, similar cases]
    OPINION Dr Fedorov's position (16.10.2026, opinion): right hemihepatectomy first: the right-lobe lesion has a fluid component that could rupture (an emergency, then carcinomatosis, after which no surgery would be radical); most of the right lobe is non-functioning tumour, so little healthy liver is lost and he sees no high risk of liver failure; the left-lobe lesion at a second stage, because one stage would leave too little functional parenchyma. Drainage or aspiration of R1 was not mentioned.
  3. L1 technique and operator. For L1 — 54 mL on the 23.09.2026 consensus model (4.9 × 3.9 × 5.9 cm), biopsy-proven viable GIST (05.10.2026) [195], 0–1 mm from the left portal branch and the left bile duct — which option is feasible here, where and by whom: resection of the left lateral section (segments II–III), irreversible electroporation (NanoKnife), histotripsy (HistoSonics), SBRT, or transarterial treatment (DEB-TACE/TARE) of the segment II/III feeding artery? [thermal ablation declined by Dr Korshak, 10–11.09.2026 OPINION; written: thermal ablation of the left-lobe focus "judged technically inadvisable" (discharge summary, 13.10.2026 [201]) FACT; conditional per ULIS [188]; June 2026: 42 × 36 mm (Israeli reading [77]). Access / cost: TARE from about EUR 40,000, not performed in Ukraine; histotripsy at HCA Healthcare UK (London) costs from £37,500 for the treatment itself, plus £500 initial review (oncologist + MDT), about £250 per clinician per visit and about £100 for the radiologist's imaging review (e-mail reply of 11.09.2026; no quote for her case issued)] [Literature: see topic 5, topic 7, similar cases]
    OPINION Dr Fedorov's position (16.10.2026, opinion): no local treatment of L1 now: for embolisation it is unclear what to embolise; ablation works for small lesions and here would be only partial; if L1 grows before stage two, palliative ablation or chemoembolisation, most likely not radical.
    Background

    As first put (before the biopsies of 05.10.2026; the 15 × 24 mm S8 focus of the report is 14 × 23 mm on the consensus model): Physical removal of the new focus, with imatinib continued. Thermal ablation has been declined because the segment II/III lesion (June 42 × 36 mm; FDG-active area 35 × 54 mm, confluent, on 23.09.2026) abuts the left portal branch and the left hepatic duct; the 23.09.2026 PET-CT adds an active 15 × 24 mm focus in segment S8. Which option does the board recommend and where can it be done: resection of the left lateral section (segments II–III), irreversible electroporation (NanoKnife), histotripsy (HistoSonics, newly approved in Europe; HCA price list 11.09.2026), SBRT, or transarterial treatment (DEB-TACE/TARE) of the segment II/III feeding artery — and how should the active rim of the right-lobe mass be handled?

  4. Same-session targets. Are the S8 dome lesion (79 mL) with its new 14 × 23 mm active focus, the R1 wall plaques and the calcified gastric primary [195] addressed in the same operation, or left or treated separately? [Literature: see topic 7, topic 9]
    OPINION Dr Fedorov's position (16.10.2026, opinion): the tumour board recommended removing the gastric tumour; in the same operation if a local resection is enough, the extent decided at intra-operative revision (20.10.2026: otherwise left for the second stage).
  5. Operator, venue, window. Who operates, where, and in which window (from 19.10.2026? OPINION), and is the contrast CT with volumetry done before the first operation (last contrast study 19.06.2026 [70])? [Literature: see topic 1, similar cases]
    OPINION Dr Fedorov's position (16.10.2026, opinion): the operation is possible "this Wednesday" if the patient agrees (INTERPRETATION 21.10.2026, computed from the call date); the written tumour-board conclusion was due on 19.10.2026.
  6. Imatinib and regorafenib. Imatinib stopped 20.10.2026 before surgery: confirm the restart date after the operation; regorafenib not allowed now: timing of regorafenib or an alternative after the local step? [imatinib stopped 20.10.2026 before surgery, restart a few days after the operation, timing to be discussed; regorafenib dispensed 30.09.2026 [76], not started, not allowed currently (family report, 20.10.2026); label: regorafenib ≥ 2 weeks after major surgery and wound healing] [Literature: see topic 7, topic 9, topic 10]
    OPINION Dr Fedorov's position (16.10.2026, opinion): imatinib "not now"; after the operation she returns to it once her condition allows — consistent with the stop on 20.10.2026 before surgery (family report). Regorafenib was not discussed.
  7. PRES safety. After haemorrhagic PRES (2023) [22]: peri-operative blood-pressure target, anaesthesia plan, and which VEGFR-active drugs (sunitinib, regorafenib) to avoid around surgery and SBRT? [Literature: see topic 7]
  8. Response check. Which check after each step — contrast CT at 4–6 weeks, PET-CT at 3 months, repeat ctDNA — and who orders and reads it? [Literature: see topic 2]
    OPINION Dr Fedorov's position (16.10.2026, opinion): one CT about two weeks after surgery to assess liver regeneration; no more frequent imaging because of the contrast and radiation load.
  9. Next systemic line or trial. Which drug or trial would cover both resistance clones (KIT exon 13 V654A and exon 18 A829P) at the lowest neurovascular risk after her PRES — sunitinib, regorafenib, ripretinib, velzatinib (StrateGIST 3), bezuclastinib + sunitinib or pimitespib — and at what point: now, or only after local control fails? [regorafenib dispensed 30.09.2026, not started, held because surgery is expected soon (family report, 14.10.2026); sunitinib prescribed 30.07 and 08.09.2026, not started; each later TKI line gives a shorter time to the next progression with more toxicity; blood-pressure safeguards needed; full comparison in the drug table] [Literature: see topic 8, similar cases]
    OPINION Dr Fedorov's position (16.10.2026, opinion): no systemic therapy other than imatinib was discussed.
    Background

    As first put (27.09.2026): New systemic drug or trial, if and when needed. Both resistance clones (KIT exon 13 V654A and exon 18 A829P) must be covered; each later TKI line gives a shorter time to the next progression with more toxicity; she had PRES with intracerebral haemorrhage on a VEGFR inhibitor. Full comparison in the drug table.

    OptionCovers V654A / A829PExpected benefitMain risk for herAccess / cost
    Sunitinib 50 mg 4/2 (prescribed)yes / nomedian PFS 5–15 months by clonehypertension, VEGFR class — PRES historyprescribed 30.07 and 08.09.2026, not started — regorafenib chosen instead
    Regorafenib 160 mg d1–21yes (VOYAGER ctDNA) / yesmedian PFS about 5 monthshypertension, hand–footNCCN category 1; chosen — dispensed 30.09.2026, not yet started
    Ripretinib 150 mgweak / strong4–6 months; equal to sunitinib in the co-mutated subgrouplowest neurovascular risk of the TKIsabout USD 36,600 per month (Israeli price ₪110,986 per 90 tablets, 09.2026)
    Velzatinib (IDRX-42), StrateGIST-1yes / yes2nd line 13.7 months, 3rd line 9.2 monthsselective KIT, low VEGFRtrial: StrateGIST 3 (velzatinib vs sunitinib after imatinib) recruiting as of 27.09.2026, incl. Warsaw (Dr P. Rutkowski), Poznań, Kielce, Essen, Berlin, Mannheim, Budapest; randomised 1:1, so a 50 % chance of sunitinib
    Bezuclastinib + sunitinib (Peak)yes / yesphase 3 (ASCO 2026, n = 413): PFS 16.5 vs 9.2 months vs sunitinib alone, HR 0.50; ORR 46 vs 26 %sunitinib risk retainedFDA decision due 30.11.2026; Peak no longer enrolling in Europe
    Pimitespib (HSP90 inhibitor)mutation-agnosticPFS 2.8 vs 1.4 months, stabilisation onlydiarrhoea, night blindness; no VEGFR activityJapan only; import about €17,700 per cycle

    Question: which of these would the board choose, at what point — now, or only after local control fails — and with what blood-pressure safeguards?

  10. Immune- and antibody-based options. Is any immune- or antibody-based approach a candidate for her now or alongside local treatment — the KIT-targeted antibody–drug conjugate trial (NN3201, NCT06805825), a checkpoint inhibitor with regorafenib, or an intratumoral or cell-therapy trial — and under what conditions? [evidence weak and mostly preclinical; TMB 3–4.8 Muts/Mb, MSS; OpenEvidence review, sections 13–16]
    OPINION Dr Fedorov's position (16.10.2026, opinion): immunotherapy is not indicated in her case; immunomodulators are of unproven efficacy; on in-vivo CAR-T: "it would be great if something like that appeared".
    Background

    As first put (27.09.2026): Immune- and antibody-based options: is anything worth pursuing now or alongside local treatment? The evidence is weak and mostly preclinical; the question is whether the board sees a rational entry point.

    What has been tried in GIST (OpenEvidence review, sections 13–16):

    ApproachEvidenceResultRelevance to her
    Checkpoint inhibitor + TKI (AXAGIST: avelumab + axitinib)Phase II, n = 56, pretreated GISTORR 8.9 %, median PFS 4.6 months; the five responders lasted a median 18.5 monthsSmall chance of durable benefit; grade ≥ 3 toxicity 30 %
    Regorafenib + checkpoint inhibitor (IMPRESARC)Retrospective French cohort46 % of GIST patients progression-free at 6 months, mostly KIT exon 11Uncontrolled, but matches her genotype and a drug already proposed
    Imatinib + peginterferon-α2bPilot, 8 treatment-naïve patients100 % response; never repeatedDepended on imatinib sensitivity — not her situation
    Checkpoint monotherapy, mRNA neoantigen vaccine, TIL therapyNo GIST data—TMB 3–4.8 Muts/Mb and MSS leave few targets

    New leads:

    • KIT-targeted antibody–drug conjugate NN3201 (c-KIT antibody + MMAE; Novelty Nobility): phase 1, NCT06805825, recruiting in the US, imatinib-pretreated GIST eligible — trial record.
    • Vδ1 γδ T cells are the anti-tumour immune population in GIST; they are depleted and reprogrammed in imatinib-resistant tumours, and PD-L1 blockade plus imatinib restores them in mice (Zeng, DeMatteo et al., 2026 preprint, PMC13252525).
    • The imatinib-resistant GIST microenvironment is immunosuppressive in a specific way: single-cell RNA sequencing of primary tumours and liver/peritoneal metastases showed resistant tumour cells engaging a higher proportion of regulatory T cells through the TIGIT–NECTIN2 axis and an enrichment of IDO1-positive dendritic cells signalling via BTLA–TNFRSF14, neither seen in imatinib-sensitive tumours (Liu X et al., Cell Death Dis 2024;15:190, doi:10.1038/s41419-024-06571-3) — a rationale for Treg-directed, anti-TIGIT or IDO1-directed approaches in resistant disease, again without clinical GIST data.
    • Intratumoral T-cell activation kills tumours regardless of antigen specificity through a paracrine innate mechanism (Ghirardelli Smith et al., Nat Immunol 2026, doi:10.1038/s41590-026-02642-z) — a rationale for intratumoral immune agents in an accessible liver lesion; no clinical GIST data.

    Question: is any of these a candidate for her — the ADC trial, checkpoint inhibitor + regorafenib, an intratumoral or cell-therapy trial — and under what conditions?

Extended questions (priority 2 and 3, decision map) (needed within days, Priority 2 supporting questions, decision map, extended questions A–I, Priority 3 research items)
Needed within days (owner)

operation protocol of 05.10.2026 (Shalimov) · contrast CT or MRI with volumetry and arterial phase (surgeon/radiology) · coagulation, CBC, biochemistry, ECOG, height/weight (treating team) · anaesthesia review incl. blood-pressure plan and SVC/port status (anaesthesia) · cell-block cytology if fluid reaccumulates (CSD) · EGD done 02.10.2026 (discharge summary [201]: erythematous gastropathy, duodeno-gastric bile reflux; the oesophagus is not described; family report 20.10.2026: a cold with a mild sore throat in the days of the 23.09.2026 PET-CT) · histology of the colon neoplasias seen at colonoscopy 02.10.2026 (Shalimov Centre).

Priority 2: supporting questions (for the same meeting if time allows; otherwise within the month)

  1. Intent: radical two-stage clearance or control of the FDG-active clones with imatinib continued; is debulking without radical intent acceptable? [11,14,16]
  2. Remnant: what functional remnant is required at each stage, and is portal-vein embolisation or ALPPS-type augmentation applicable if S4 (± S1) is the final remnant? [16]
  3. L1 anatomy: enucleation versus left lateral sectionectomy — depends on invasion of the LHV and segment III pedicle; who reads the contrast CT/MRI for this? [5]
  4. Boundary nodules: does the board accept the R1 wall as the origin of the dome focus and wall plaques (“nodule within a mass”), and does that change the order? [17]
  5. Small foci (S1 1.6 mL, P7, P12): included in the resection field, surveillance, or ablation if they grow?
  6. Gastric primary: endoscopic/EUS surveillance versus wedge resection at a liver stage, given that one hyalinised fragment does not exclude viable cells? [9,10,18]
  7. If the frozen section at surgery is positive: abort, limited procedure, or proceed for liver-dominant disease? [19,20,21]
  8. Second-line alternative if regorafenib is unsuitable after PRES review: sunitinib (covers V654A only), ripretinib (self-pay), or trial (velzatinib versus sunitinib)? [1,22,23]
  9. Transarterial option for R1 wall plaques if the right lobe is not resected first: TACE/DEB-TACE available in Kyiv; TARE abroad (centre, cost, lung-shunt study)? [24,25]
  10. Extrahepatic clearance before major surgery: EGD for the oesophageal uptake; SVC/port status; is anything else required? [187][77]

Decision map (which prerequisite gates which decision; numbers refer to the board questions 1–10, P2 to Priority 2)

  1. Peritoneal status (Q1) gates everything surgical: confirmed malignant fluid → the surgeon has said surgery is not indicated OPINION; indeterminate → the board decides whether to proceed with peritoneal inspection and frozen-section washings at the start of surgery, or to re-sample first; negative → operability assessment. Inputs: operation protocol; cell block if fluid reaccumulates; the AUS category’s pooled risk of malignancy (about 50 %, carcinoma-dominated data) [2].
  2. Current imaging (Q5) gates target definition: the only contrast study is 19.06.2026; the 23.09.2026 CT is non-contrast and cannot show vessels, ducts or small isodense lesions. Procedure planning on imaging older than about 30 days is outside usual practice (case-site evidence review INTERPRETATION).
  3. Intent (P2-1) gates the sequence: radical intent requires that L1 be resectable with a margin after stage 1 (unknown: invasion of the LHV/segment III pedicle OPINION); control intent allows single-target procedures (L1 alone, S8 alone) with imatinib continued.
  4. Remnant volume and function (Q2, P2-2) gates which stage can be first: by the inferred map the remnant after right hemihepatectomy + S1 is 49–53 % of non-tumour parenchyma; the remnant after removing both targets in one stage is S4 (± S1) only, 9–20 % INTERPRETATION. Surgical CT volumetry must replace these estimates.
  5. R1 handling (Q2) depends on 3 and 4: resection of R1 is the right-sided stage; drainage/sclerosis has no GIST-specific evidence base (topic 2) and raises spillage/infection questions; transarterial therapy targets only the perfused wall.
  6. Modality for L1 and the S8 focus (Q3, Q4) depends on 2 (vessel/duct relation) and 3: thermal ablation declined for L1 OPINION; non-thermal options (IRE, SBRT, histotripsy) and transarterial options have little or no GIST-specific data (topics 5, 6); the S8 focus is subcapsular and away from the hilum.
  7. Gastric primary (Q4) is independent of the liver sequence except for the combined-procedure risk raised by the surgeon OPINION.
  8. Systemic timing and PRES safety (Q6, Q7) wrap around every step: imatinib hold only peri-procedurally (guideline practice [11]); regorafenib label hold ≥ 2 weeks before elective surgery and ≥ 2 weeks after major surgery until wound healing [12] (regorafenib not started, held pending surgery per family report, so only the post-operative condition applies); PRES history argues for blood-pressure control and specialist review before any VEGFR-pathway drug.
  9. Response check (Q8) closes the loop after each step: contrast CT (Choi criteria), PET-CT at 3 months, ctDNA (exploratory).

Extended questions

Format for each item: question; why it matters now; facts on file (tags, records); options the board can weigh (pros/cons as reported by the sources, not a recommendation); what would change the answer; who should answer; one literature pointer (details in the topic sections below).

A. Prerequisites and staging

A1. Peritoneal cytology. Should the ascitic finding be treated as peritoneal metastasis? - Why now: the surgeon’s conditional statement of 13.10.2026 (“if confirmed, surgery is not indicated”) OPINION has not been commented on after the CSD review did not confirm it (14.10.2026). - Facts: Shalimov 06.10.2026, 3 smears, Romanowsky–Giemsa: clusters with marked nuclear polymorphism, category V FACT [196]. CSD LAB 14.10.2026, 2 of those slides, Pappenheim: low-quality sample, dense groups of small relatively monomorphic cells, no pleomorphism, AUS, origin undeterminable without a cell block FACT [197]. Ascites volume and peritoneal inspection: not documented (protocol not received). 2022 anamnesis: “sarcomatosis of the abdominal cavity, greater omentum” FACT [5]; 2025: ametabolic cystic peritoneal node over the uterus FACT [67]; 06/2026: small fluid in the pouch of Douglas FACT [70]; imatinib itself causes fluid retention with ascites in a minority of patients [26]. - Options: (i) repeat cytology on new fluid with cell block and CD117/DOG1/calretinin (needs a puncture or re-laparoscopy; a small-volume effusion may not be reachable); (ii) treat as indeterminate and proceed with planning (risk: operating on peritoneal disease); (iii) treat as positive (risk: withholding local therapy on a non-reproduced reading). Pooled risk of malignancy for AUS is 49 % (95 % CI 37–61 %) in carcinoma-dominated series, with poor inter-observer agreement for the atypical categories [2,27]; a cell-block immunopanel re-classified 86 % of AUS fluids in one series [28]; low-grade sarcomas rarely exfoliate into effusions [29]; in the published GIST effusion cases the tumour cells were large/pleomorphic and DOG1/CD117 positive on cell block [3,30]. - What changes the answer: the operation protocol (nodules seen or not); a cell-block result; interval imaging of the peritoneum. - Intra-operative practicality (parallel search, lit_peritoneal_staging/SOURCES.md; carcinoma data): laparoscopic inspection agrees with laparotomy on the presence of any peritoneal disease in about 96 % but under-estimates the extent; frozen section of peritoneal nodules is discordant in about 2.4 % (gastric cancer); rapid stains on washings take 21–54 minutes with sensitivity about 63–79 %; the definitive DOG1/CD117 cell block is a paraffin result. Washings should be taken into fixative for a cell block whatever the frozen-section result. - Who: cytopathology (both laboratories), the operating surgeon, medical oncology. - Literature: topic 4 — AUS pooled risk of malignancy 49 % [2].

A2. Laparoscopy protocol and peritoneal staging. What did the 05.10.2026 laparoscopy show, and is a second look needed before any resection? - Facts: the surgeon’s stated aim was to exclude extrahepatic lesions and biopsy anything suspicious OPINION (chat 04.10.2026); only the pathology and cytology forms have been received FACT [195][196]. Peritoneal GIST surgery series describe outcomes for macroscopic disease, not for cytology-only findings [31,32]. - Options: request the protocol; re-laparoscopy with peritoneal biopsies and washing at the start of any resection; PET-CT review of the peritoneum (23.09.2026: no peritoneal uptake described) FACT [187]. - Who: operating team. - Literature: topic 4 — peritoneal versus liver-only disease: HR for death 2.67 (peritoneum only versus liver only) in one multivariable analysis [19], no OS difference by site in an oligometastatic cohort [20].

A3. Imaging currency. Is a contrast-enhanced CT or MRI of the liver with volumetry required before any decision? - Facts: last contrast study 19.06.2026 FACT [70]; 23.09.2026 CT non-contrast, 3.27 mm slices; vessels and ducts not assessable FACT [187]; the three-date model transfers the June portal vein onto the September study by registration (approximation of a few millimetres) INTERPRETATION. - Options: multiphase CT with volumetry; MRI with hepatobiliary contrast (small lesions, biliary relation); MRCP; ICG clearance or hepatobiliary scintigraphy for function. - Who: liver surgeon with radiology. - Literature: topic 3 — remnant volume thresholds are set on CT volumetry, not on inferred segment maps (case-site estimate INTERPRETATION).

A4. Tissue genotype of the progressing lesion. Should block 4222/26 be sequenced now? - Facts: ctDNA carries V654A (8.8 %) and A829P (4.0 %) alongside the exon 11 driver (17 %) FACT [75]; the biopsied L1 was not genotyped FACT [195]; the Shalimov pathologist offered a 40-gene panel including KIT (about 3 weeks) OPINION; the treating oncologist saw no fundamental point in further genetics before surgery OPINION (13.10.2026). - Options: sequence the cores now (information on which clone L1 carries; may guide the second-line choice); defer to resection material (more tumour cells, per the pathologist OPINION); rely on ctDNA (cannot assign clones to lesions). - Literature: topic 8 — secondary KIT mutations differ between metastases within one patient (inter-lesion heterogeneity) [33]; exon 13 and exon 17/18 co-mutation defines a subgroup where sunitinib and ripretinib performed alike in INTRIGUE ctDNA analyses [1].

A5. ctDNA as a monitoring tool. Should a repeat FoundationOne Liquid (or equivalent) be drawn before and 4–8 weeks after any local procedure? - Facts: one ctDNA time point exists (20.08.2026) FACT [75]. - Options: paired samples to document clone clearance after removal of L1/S8 (exploratory; no GIST standard); PET-CT at 3 months (Tahover OPINION). - Literature: topic 8 — ctDNA tumour fraction tracks active disease in GIST; no validated post-local-therapy endpoint identified.

A6. Extrahepatic clearance. Oesophageal uptake, femoral-head lucency, uterine masses and lung nodules: is anything unresolved that changes the intent? - Facts: oesophageal SUVmax 2.0–3.2, EGD advised, status undocumented FACT [187]; femoral lucency reported once (LISOD 07/2026 [71]) and not confirmed by two later readings FACT [77][187]; uterine lesions stable with low uptake for years FACT; lung nodules tiny and stable FACT [77]. - Who: gastroenterology (EGD); radiology.

B. Goals

B1. Radical versus control intent. What does “oligoprogression” mean in this patient and does it justify a two-stage operation with risk at both stages? - Facts: active tissue is multifocal within the liver (L1, S8 focus, several R1 wall plaques, P7) {F/I} [187]; all macroscopic disease is hepatic plus a FDG-cold primary and an unresolved peritoneum; the surgeon framed two-stage surgery as justified mainly with radical intent and questioned oncologists’ endorsement of debulking alone OPINION (18.09.2026). - Options as reported: radical two-stage resection (surgeon OPINION); clone-directed local therapy of the active foci with imatinib continued (NCCN/ESMO option for limited progression [11,34]); systemic switch without local therapy (Czarnecka OPINION; Tahover favours systemic plus IR OPINION). - What changes the answer: peritoneal status; whether the pattern is judged unifocal or multifocal progression (post-surgical PFS 11 versus 6 months and OS 59 versus 24 months in the two-institution series [14]); R0 feasibility for L1 (median OS 8.7 years after R0/R1 versus 5.3 years after R2 in the EORTC series; debulking did not appear to prolong survival [16]). - Who: the whole board. - Literature: topic 1 — multifocal progression predicted worse PFS after surgery, HR 3.08 [14].

B2. Definition of success. Which endpoint should the plan be judged by: PET/ctDNA clearance of the resistant clones, time on imatinib gained, or R0 status? - Options: FDG-PET response at 3 months (used by the consultants OPINION); ctDNA clearance (exploratory); imaging per Choi criteria rather than RECIST (size-stable disease here).

C. Sequencing

C1. Which target first. Right-sided stage (R1 + dome lesion + S1) first versus L1 first? - Facts: 18.09.2026: right hemihepatectomy + S1 first, L1 second after regeneration, “never in one stage” OPINION; 09.10.2026: “most likely two-stage: first removal of the focus from the left lobe, then 2–3 weeks of recovery; after regeneration the second stage, complete removal of the right-lobe focus; first operation not before 19.10” OPINION; the reason for the change is not documented. Volumetry INTERPRETATION: non-tumour parenchyma 1.41 L; remnant after right hemihepatectomy + S1 ≈ 0.69–0.78 L (49–53 %); remnant after left lateral sectionectomy ≈ 0.84–0.95 L (60–66 %), but that remnant contains R1 and is mostly right-sided parenchyma compressed around a 1.2 L mass; final remnant after both ≈ S4 (± S1) ≈ 0.12–0.26 L (9–20 %) before regeneration. Standardised liver volume for 65 kg ≈ 1.2–1.4 L (height unknown) INTERPRETATION. - Considerations reported by sources: right first removes the largest tumour load and the dome focus in one operation and leaves the left lobe to regenerate OPINION; left first treats the biopsy-proven, fastest-growing, FDG-dominant lesion and is a smaller operation, but leaves R1 and the S8 focus for a later major hepatectomy whose remnant would then be S4 ± S1 after interval regeneration {O/I}; one-stage removal of both is excluded by remnant size {O/I}. - Risks created by each order for the next step: right first → the second stage operates on a regenerated but tumour-bearing left lobe; invasion of the LHV/segment III pedicle may force a larger resection OPINION; left first → delays removal of R1 and the S8 focus; the remaining liver is dominated by the mass; a complication (bile leak, collection) could delay stage 2 while regorafenib is withheld. - What changes the answer: surgical volumetry and function tests; L1’s relation to the LHV and portal pedicle on contrast imaging; peritoneal status; the board’s intent. - Who: liver surgery with anaesthesia. - Literature: topic 3 — no published series addresses lesion order in bilobar GIST; staged hepatectomy data come from colorectal metastases (see topic 3 table).

C2. R1 first by non-resective means. Can the mass be drained, aspirated or sclerosed to “remove the dangerous right lobe” before anything else? - Facts: R1 is 1.2 L, 97 % fluid/necrotic by density partition (core 1050 mL, wall 153 mL at the September HU split) INTERPRETATION; active tissue is confined to wall plaques (anterolateral strip, base, medial wall) and to the dome lesion above the septum INTERPRETATION; the May 2025 11 mm mural nodule maps to the anterolateral strip and not to the dome focus INTERPRETATION; the mass contacts the IVC, MHV/RHV and right portal branches and abuts the gallbladder INTERPRETATION. - What the user’s question implies: that the enhancing wall “generates” boundary nodules. Imaging supports growth of activity along the wall and in the adjacent dome lesion FACT [187], but not that drainage of the fluid would remove the wall, which is the viable compartment. - Options and the concerns reported by sources: aspiration/drainage (no GIST-specific series found; concerns raised in the literature search: infection of a necrotic cavity, spillage/seeding along a tract, haemorrhage; the wall remains); ethanol sclerosis (no GIST data); resection (right hemihepatectomy; surgeon: most of the removed volume is non-functional tumour, risk “not high” OPINION); transarterial therapy of the wall (TACE/DEB-TACE/TARE; surgeon sceptical: hypovascular tumour, “resorption of a large amount of tumour parenchyma, which may turn into an abscess” OPINION; radioembolisation is not available in Ukraine OPINION). - Who: liver surgery and interventional radiology together. - Literature: topic 2 — rupture/haemorrhage of GIST liver metastases is reported as case reports; tumour rupture is defined by spillage and piecemeal resection criteria [35].

C3. L1 before or after R1 when the intent is control only. If the board does not pursue radical surgery, which single procedure gives the most benefit per risk? - Facts: L1 holds about half of the active tissue (36–61 mL of 51–111 mL depending on threshold) INTERPRETATION; the S8 focus is 3.6–10.8 mL; R1 wall plaques 10–39 mL INTERPRETATION. - Options: L1 alone (resection or non-thermal ablation or SBRT) with imatinib continued; L1 plus S8 focus in one session (combined resection + ablation/SBRT); R1 wall plaques by transarterial therapy only. - Literature: topic 1 — local treatment in metastatic GIST was associated with better OS in the Dutch registry (HR 0.56), with the benefit concentrated in liver-confined, responding disease [36].

C4. Boundary foci and small lesions. How should S1 (1.6 mL, ametabolic), P7 (0.4 mL, PET-defined) and P12 (0.7 mL PET-only) be handled in each sequence? - Facts: S1 caudate focus 7–16 mm from the IVC and portal vein INTERPRETATION; the surgeon would remove S1 with the right-sided stage OPINION; P7 touches the R1 wall INTERPRETATION. - Options: include in the resection field; surveillance; ablation if they grow.

C5. Timing between stages and with systemic therapy. What interval between stages, and when does regorafenib (or an alternative) start? - Facts: surgeon: 2–3 weeks recovery then regeneration before stage 2 (09.10) OPINION; earlier: “a month or two” (18.09) OPINION; regorafenib label: hold ≥ 2 weeks before elective surgery, do not give for ≥ 2 weeks after major surgery and until wound healing [12]; imatinib: continue until surgery and restart with oral intake (ESMO practice [11]); imatinib interruption in responding GIST leads to early progression in most patients (BFR14) [13]. - Options: imatinib throughout both stages, regorafenib after the second stage; regorafenib between stages (requires two label holds); no second-line drug while the disease is controlled locally.

D. Modality per target

D1. L1 modalities. - Resection: left lateral sectionectomy (anatomical; takes 0.45–0.57 L of parenchyma by the inferred map INTERPRETATION) or enucleation leaving a cavity (surgeon: technically feasible, limited by invasion of the LHV/segment III branches OPINION). Contact with the left portal branch is 0–0.8 mm with a contact patch of 0.25–0.34 mL and a patent vein INTERPRETATION; the LHV relation is unresolved INTERPRETATION. - Thermal ablation (RFA/MWA): contraindicated per Dr Korshak (portal branch and left bile duct adjacency) OPINION; ULIS: only with a safe ultrasound path, bile ducts being the main obstacle OPINION; heat-sink and biliary injury are the reported risks for perihilar ablation. - IRE: non-thermal, used for tumours within 1 cm of major bile ducts in small series [5]; no GIST series; lesion size 5 cm is above the typical ≤ 3 cm indication. - SBRT/CyberKnife: composition-independent; in the only prospective GIST radiotherapy study 80 % of irradiated lesions stabilised for a median 16 months [7]; dose constraints for the hilum and stomach (15–20 mm away) apply; combination with VEGFR inhibitors is a reported toxicity concern. - Transarterial (TACE/DEB-TACE/TARE): treats perfused tissue; the surgeon doubts an arterial supply (“hypovascular, dark on CT”) OPINION; GIST series exist for TACE and SIRT (topic 6); TARE not available in Ukraine OPINION. - Histotripsy: approved in the EU in 2026 per the case site (not verified from a primary source here); pivotal trial treated tumours ≤ 3 cm with 95 % technical success [8]; no GIST patients identified; HCA London: initial review £500, treatment from £37,500 FACT [191]. - Electrochemotherapy: unsuitable (electrode depth) OPINION; an open study in Padova accepts visceral lesions of any histotype (NCT06753136; parallel search lit_local_therapy/TRIALS.md). - HDR brachytherapy: 10 imatinib-refractory GIST patients, local control 97.5 %, median PFS 6.8 months (parallel search lit_local_therapy/SOURCES.md, R7); not available locally as far as known. - Literature: topic 5 — IRE within 1 cm of major ducts: 11 patients, 22 metastases, no definite duct injury [5].

D2. S8 focus modalities. Subcapsular dome location, 3.9–8.2 mm from the hepatic-vein outline, inside a 79 mL cystic lesion INTERPRETATION. - Options: percutaneous MWA/RFA (ultrasound visibility of a 14 × 23 mm focus inside a cystic lesion is the practical question OPINION ULIS); laparoscopic ablation; SBRT; wedge/segmentectomy; part of a right hemihepatectomy; transarterial therapy. - Literature: topic 5 — thermal ablation of small GIST metastases has mature data for solid lesions, not for foci inside cystic masses (OpenEvidence review on the case site COMMENTARY).

D3. R1 wall plaques. Options: transarterial therapy; SBRT to the dominant anterolateral plaque (6.8–15 mL) INTERPRETATION; ablation of individual plaques (subcapsular lateral wall); resection with R1.

D4. Gastric primary. FDG-negative since 08/2023, calcifying, 4 cm, no viable cells in one fragment FACT [195]; exophytic, abutting the pancreatic tail INTERPRETATION; “technically easy to remove”, but the surgeon would rather not combine it with an extensive liver resection (healing, anastomotic leak) OPINION. - Options: surveillance (EGD/EUS, PET); wedge resection at a liver stage; later separate resection; pathological complete response is uncommon in resected GIST after imatinib and single-fragment sampling cannot exclude viable cells [9]; resection of the primary in metastatic GIST before imatinib did not improve outcome in one series [37].

D5. Centre and access. Which procedures are available in Kyiv (Shalimov NSCST: resection, transplantation, systemic therapy, ablation, TACE OPINION), in Zaporizhzhia (RFA OPINION), and abroad (SIRT Gliwice; CyberKnife Warsaw; liver surgery Warsaw OPINION Czarnecka; histotripsy London/Cambridge FACT case site)? Centres with published GIST liver local-therapy experience and verified contacts (parallel search, lit_trials_centres/CENTRES.md): NIO-PIB Warsaw (surgery on imatinib); WTZ Essen (metastasectomy on TKI); Mannheim (SIRT for GIST liver metastases, 2015 and 2025 series); INT Milan (surgery of residual/limited-progressive disease); Gustave Roussy (RFA of GIST metastases); Leeds (liver resection; histotripsy site); Royal Marsden (liver surgery). No Israeli centre has a published GIST liver local-therapy series.

E. Systemic therapy interplay

E1. Imatinib continuation. Continue imatinib through all local therapy? - Facts: guideline practice is to continue the TKI with local treatment of limited progression [11,34]; the ULIS doctor suggested pausing targeted therapy around RFA for 1–2 weeks OPINION; the surgeon noted impaired wound healing with imatinib and regorafenib and advised waiting, but judged the laparoscopy risk moderate OPINION; imatinib was interrupted around the colonoscopy (02.10) and the laparoscopy (05.10) per chat OPINION, resumed on 06.10.2026, currently taken and to be continued until the operation (family report, 14.10.2026). - Literature: topic 7 — imatinib interruption after response: most patients progress within months (BFR14) [13]. Practice statements on the pre-operative pause: ESMO “a few days or even 1 day” [11]; GEIS 24 h [38]; British Sarcoma Group 2024 “usually stopped a week before surgery; much shorter intervals appear to be safe” (parallel search, lit_periop_tki/SOURCES.md A1).

E2. Regorafenib start. Before, between or after the local procedures? - Facts: dispensed 30.09.2026 FACT [76]; not started, held because surgery is expected soon (family report, 14.10.2026), so only the post-operative label condition applies at present; label: wound-healing hold ≥ 2 weeks pre-, ≥ 2 weeks post-surgery [12]; grade ≥ 3 hypertension and PRES are label warnings; Czarnecka: “not a bad choice” OPINION; Tahover: acceptable but harder to tolerate OPINION; TARGET clinic: sceptical of both sunitinib and regorafenib, proposes immunotherapy off-label OPINION (hypothesis only). - Options: start after the last planned procedure (≥ 2 weeks after major surgery and after wound healing); start between stages (would require a ≥ 2-week hold before the next operation); alternative agents (sunitinib — covers V654A only; ripretinib — covers A829P, weak for V654A, lowest neurovascular risk, self-pay; trial). - Literature: topic 8 — INTRIGUE ctDNA: exon 11 + 13/14 favoured sunitinib, exon 11 + 17/18 favoured ripretinib; the co-mutated subgroup showed no difference [1].

E3. PRES history. What does a haemorrhagic PRES on pazopanib (2023) require before sunitinib/regorafenib/SBRT or major surgery? - Facts: PRES with left occipital haemorrhage and multifocal vasoconstriction, BP 150–160 mmHg, resolved by 06/2023 FACT [22][54]; no neurology review since 2023 on file. - Options: baseline neurology review and BP plan; home BP monitoring; reduced starting dose (consultants’ suggestion on the case site INTERPRETATION); avoidance of VEGFR inhibitors around SBRT. - Literature: topic 7 — rechallenge data after TKI-associated PRES are limited to case reports (see topic 7).

E4. Monitoring. PET-CT at 3 months (Tahover OPINION) versus contrast CT with Choi criteria; ctDNA kinetics.

F. Risk and function

F1. Remnant volume. Estimates INTERPRETATION (inferred segments; to be replaced by surgical volumetry): see Appendix 1. Conventional thresholds (25–30 % of a healthy liver, 40 % after chemotherapy/steatosis) are from colorectal/HCC practice, not GIST-specific; the parenchyma here has hypertrophied around a 1.2 L mass, so volume may overstate function. F2. Vascular and biliary anatomy. L1: left portal branch contact, LHV unresolved; R1: IVC contact, MHV/RHV ≤ 2 mm, right portal branches ≤ 1 mm; the S8 focus: 4–8 mm from the hepatic-vein outline INTERPRETATION. Hepatic artery and bile ducts were not segmentable on the available studies INTERPRETATION. F3. Bleeding and haemostasis. Platelets 216, bilirubin normal, albumin 42.8 g/L FACT [193]; coagulation not documented since 2023; SVC occlusion suspected (port) FACT [77]. F4. PRES and anaesthesia. BP control intra- and postoperatively; HCA’s eligibility question on general anaesthesia FACT (case site, “ablation” section). F5. Infection and spillage. Necrotic 1.2 L cavity (abscess risk after embolisation/drainage OPINION surgeon; literature topic 2); tumour rupture criteria include spillage and piecemeal resection [35]; peritoneal recurrence after rupture is high even with adjuvant imatinib in gastric GIST cohorts [39]. F6. Diabetes, anaemia, SVC. Glucose 6.9 mmol/L; Hb 121 g/L, MCV 101 fL (B12/folate not recent) FACT [192][193].

G. Information still missing (who could provide it)

See the ‘Needed within days’ list in the main document; in addition: height and weight (volumetry ratios); ECOG; whether L1 was biopsied under laparoscopic or percutaneous ultrasound (sampling path matters for seeding discussions) (Shalimov); the exact fluid volume aspirated at laparoscopy (Shalimov); whether frozen or additional fluid remains (Shalimov cytology); and Dr Korshak’s pending answer on whether the target of any local treatment would be the new focus or the old lesion (case site, 11.09.2026).

H. Disagreements between consultants (exact statements, level, what would resolve them)
Topic Statement A Statement B Level What would resolve it
Thermal ablation of L1 Contraindicated: proximity to the left portal branch and direct adjacency to the left bile duct (Korshak, 10.09.2026) Possible if ultrasound shows the focus and a safe path; large vessels are not the main obstacle, bile ducts are (ULIS, 15.09.2026) OPINION / OPINION In-person ultrasound assessment; contrast CT/MRI with biliary anatomy
Surgery at all Two-stage resection feasible and potentially radical (Fedorov, 18.09.2026) Surgery not recommended for multiple liver metastases at her centre; not a standard approach (Czarnecka, 29.09.2026); surgery “not a good option” (Tahover, 17.09.2026) OPINION / OPINION Board decision on intent; peritoneal status; surgical volumetry
Stage order Right hemihepatectomy + S1 first (Fedorov, 18.09.2026) Left-lobe focus first, right lobe after regeneration (Fedorov, 09.10.2026) OPINION / OPINION Surgeon’s written plan after histology and the 15.10 consilium
Embolisation Hypovascular tumour, limited benefit; radioembolisation not targeted enough, abscess risk (Fedorov) RFA/TACE/SIRT/external radiotherapy are the applicable IR tools (Tahover); TACE theoretically possible after angiography (ULIS) OPINION / OPINION Arterial-phase CT or angiography of the feeding vessels
Histotripsy New, very expensive, unproven for GIST and for this size (Korshak); “does not work” (Fedorov) Under discussion on the case site; manufacturer’s opinion pending OPINION / — Written candidacy opinion from a histotripsy centre
Imatinib now “As I understood your oncologist, this drug is no longer effective”; impairs wound healing, preferably wait (Fedorov, 02.10.2026) Continue imatinib through local therapy (guideline option; case-site evidence review); ULIS: pause 1–2 weeks around RFA OPINION / COMMENTARY Oncologist’s written peri-procedural instruction
Peritoneal cytology Category V, metastasis of a malignant process (Shalimov, 06.10.2026) AUS, origin undeterminable, no cell block (CSD LAB, 14.10.2026) FACT / FACT Cell block with IHC on new fluid; third slide
Second-line drug Sunitinib or ripretinib, start now (Tahover); sunitinib (LISOD 30.07/08.09) Regorafenib “not a bad choice” (Czarnecka); regorafenib chosen at LISOD; immunotherapy off-label (TARGET) OPINION / FACT / OPINION Oncologist’s decision after the board; trial screening
Right-mass size change 2025 → 2026 Enlarged, from 11–12.5 cm to ~15 × 10 cm (Israeli reading) Stable, 13.5 → 14.4 cm (primary reports); volumetry +4 % (consensus masks) FACT / FACT / INTERPRETATION Accept the matched-mask volumetry as the comparison
I. Evidence summary (short; details in the topic sections)
  • Local treatment of limited progression on imatinib with the TKI continued is an option in ESMO and NCCN guidance [11,34]; outcomes after surgery depend on the response pattern at operation (responsive ≫ unifocal > multifocal progression) [14] and on completeness of resection [16]; a registry analysis associated local treatment with better OS in selected patients [36].
  • No published series was identified for drainage, aspiration or sclerosis of a cystic GIST liver metastasis; the related literature concerns rupture, haemorrhage and the definition of tumour rupture [35].
  • Ablation adjacent to the portal pedicle: thermal techniques carry heat-sink and biliary-injury risk; IRE has small series near major ducts [5]; histotripsy has no GIST data and a ≤ 3 cm pivotal-trial population [8].
  • Transarterial therapy and radiotherapy have small GIST series (topics 5–6); the only prospective GIST radiotherapy study stabilised 80 % of irradiated lesions [7].
  • Peritoneal cytology: the AUS category carries a pooled risk of malignancy near 50 % with poor reproducibility; cell block with DOG1/CD117 is how GIST cells are identified in fluid [2,3].
  • Systemic therapy: imatinib interruption after response leads to early progression [13]; regorafenib must be withheld ≥ 2 weeks before elective surgery [12]; the exon 13 + 18 co-mutation is a subgroup without a clear winner between sunitinib and ripretinib [1].

Priority 3: research-type and longer-horizon items (not for this month’s decision)

  1. KIT/PDGFRA genotyping of the liver cores (block 4222/26) or of the resection specimen: which clone does L1 carry? [33,40]
  2. Repeat ctDNA before and 4–8 weeks after local therapy to document clone clearance (exploratory; no validated endpoint) [41].
  3. Cell block and CD117/DOG1 on any archived fluid or a third slide of 996/26 (confirmatory only; not a reason to delay) [28,30].
  4. Trial screening for StrateGIST 3 (velzatinib vs sunitinib; Budapest, Pécs and German sites; the Polish sites were listed as recruiting on ClinicalTrials.gov on 05.10.2026 but a parallel registry check reports Polish recruitment ended 12.10.2026 — confirm with GSK) if no local step is taken or after recovery; starting regorafenib may remove eligibility [23].
  5. Histotripsy candidacy opinion (Cambridge/London) for L1: no GIST data, pivotal trials ≤ 3 cm, hilar structures excluded [8,42,43].
  6. TARE enquiry (Gliwice, London): largest GIST series median hepatic PFS 16 months in TKI-exhausted patients [24].
  7. Tissue biobanking of any resection specimen (CSD has a biobank; family’s note). OPINION Dr Fedorov’s position (16.10.2026, opinion): the specimen goes unaltered to the Centre’s pathology laboratory under the standard protocol; any special preservation (e.g. freezing) must be arranged with the pathologist or laboratory; biobanking does not affect treatment (16.10 and 20.10.2026).
  8. Literature review for the long term: see the topic sections below.

Full submission (header, appendices, print version) — the same questions with the case header, key facts, lesion table, appendices and consultants' statements, as one document (EN / UA).

Timeline

Disease course and anticancer treatment progression response stable baseline pathology / genomics adverse event / consultation

Hover or tap a marker for details; click to jump to the row in the table below. The quiet imatinib period (mid-2023 to mid-2026) is compressed by default so the dense 2022–2023 and 2026 periods stay readable.

Where a study had several readings, the authoritative one is in bold and superseded readings are in grey.

PeriodEvent / treatmentKey findingResponseSources
Aug 2022FACT Presentation; liver-metastasis core biopsy 29.08.2022 (NCI); tumour board 31.08.2022Read as uterine leiomyosarcoma T2NxM1 with liver and peritoneal metastases; no IHC (too little material). CT already listed GIST in the differentialBaselinebiopsy[3] UA original: biopsy1.jpg · UA original: biopsy2.jpg · UA original: биопсия_метастаза.jpeg · tumour board[4] UA original · CT 23.08[1] UA original · MRI 25.08[2] UA original
Sep 2022 – Jan 2023FACT Gemcitabine + docetaxel + bevacizumab, 4 cycles (NCI Ukraine, then Innovacia)Pelvic deposits gone, uterine mass stable; liver lesions enlarged (MRI 14.10.2022, CT 01.12.2022)Progression in the liverMRI 14.10[5] UA original: MRI_14_10_1.jpg · UA original: MRI_14_10_2.jpg · CT 01.12[7] UA original · CT 04.01.2023[13] UA original
Dec 2022FACT German second CT reading (RNI Neu-Isenburg); Oncomine Comprehensive Assay Plus on the Aug 2022 block; germline panelKIT exon 11 Q556_V559>H, VAF 42.5 %; subclonal KIF5B-MET fusion; TMB low, MSS; germline BRCA1/2, CHEK2, PALB2 negativeBasis for a TKIOncomine[11] UA original · germline panel[12] UA original · geneticist commentary[18] RU original · German reading[10]
05 – 12.01.2023FACT Pazopanib 800 mg/dayStopped on day 8 for headache, confusion, loss of consciousnessDiscontinued—
13 – 25.01.2023FACT Hospitalisation (Oberig); brain MRI 13.01 and 20.01.2023; pulse steroids; repeat liver biopsy 24.01.2023PRES with left occipital haemorrhage and multifocal vasoconstriction; BP 150–160 mm Hg; biopsy again read as leiomyosarcoma metastasisResolved; CT 09.02.2023 showed 12 % liver regressionMRI 13.01[15] UA original · MRI 20.01[19] UA original: MRI_Brain_20_Jan_2023.jpg · UA original: MRI_Brain_20_Jan_2023_2.jpg · discharge summary[22] UA original · CT 09.02[29] UA original
Feb – Mar 2023FACT Trabectedin 2 mg, 3 cycles (Innovacia); PET-CT 11.04.2023 with Israeli revision 19.04.2023Israeli revision: liver and paragastric masses larger and metabolically active; activity mismatch raises a gastric GIST primary. Primary LISOD read: same findings, no diagnostic comment.Progression; diagnosis questionedPET-CT 11.04.2023[37] UA original · Israeli revision 19.04.2023[38] RU original
Apr 2023FACT EUS-FNA of the paragastric mass 21.04.2023; liver core biopsy 25.04.2023 (LISOD)Pathology: GIST of the stomach, DOG-1 and CD117 positive, desmin negative; GIST metastasis in the liverDiagnosis revisedEUS-FNA[40] UA original · pathology[41] UA original
03.05.2023FACT Imatinib 400 mg/day started in hospital under supervision (PRES risk); 04.05.2023 re-assessment of the Aug 2022 slideAug 2022 block re-tested: CD117 and DOG-1 positive — the 2022 leiomyosarcoma reading is revisedTreatment startedoncology conference 03.05.2023[43] UA original
04.06.2023FACT Israeli pathology revision of all three 2023 samples (Prime Pathology / Manor); Dr. Tahover consultation 07.06.2023GIST confirmed in all three samples; DOG1, CD34, c-kit positive, SDH-B deficit flagged as unusualDiagnosis settledpathology revision[49] RU original · Dr. Tahover[51] RU original
17.08.2023FACT PET-CTLiver lesions lost their active solid peripheral components; dominant mass 190 → 160 mm, gastric mass 58 → 44 mm, almost fluidMarked metabolic responsePET-CT 17.08.2023[59] UA original
14.03.2024FACT PET-CT; Israeli revision 25.03.2024; Dr. Tahover 27.03.2024Dominant mass 160 → 150 mm; no active components, no new lesions (both readings agree)Stable; continue imatinibPET-CT[60] UA original · Israeli revision[61] RU original · Dr. Tahover[62] RU original: Zherlitsyna Anastasia - Dr. Tah… · IL original: Transcript Dr. Tahover.docx
13.05.2025FACT PET-CT (Feofaniya); LISOD re-read 19.05.2025; consultations 19.03 and 21.05.2025LISOD re-read: cystic, inactive residues, dominant lesion 150 → 135 mm; new 11 mm mural nodule without focal FDG increase, follow-up advised. Primary read: "PET negative".Stable; continue imatinibPET-CT[67] original · LISOD re-read[68] original · consultation 19.03[66] original
19.06.2026 (read 19.06, 08.07, 08.09)FACT PET-CT (Feofaniya) with three readings: primary report 19.06; LISOD retrospective re-read 08.07.2026; Israeli expert reading 08.09.2026 (Dr. Kulikova)Expert reading (authoritative): metabolic progression — left-lobe lesion 42 × 36 mm with increased uptake, right-lobe mass ~15 × 10 cm with increased peripheral uptake, gastric lesion unchanged, portal vein patent, no bone lesions. LISOD re-read: new enhancing, FDG-active mural nodules (left-lobe SUVmax 3.2 vs liver 2.0); 31 mm femoral-head lucency (not confirmed by the expert reading). Primary report: read as stable (144 × 104 × 141 mm, left-lobe 45 × 36 mm) — superseded.Progression on imatinib after 3 yearsexpert reading 08.09[77] · LISOD re-read 08.07[71] UA original · primary report 19.06[70] UA original
30.07.2026FACT LISOD oncologist (Dr. Yermakov); baseline echocardiogram before sunitinibReturn of mural components on imatinib; echocardiogram normal, EF 67 %Sunitinib 50 mg 4/2 prescribed — not startedoncologist 30.07[72] · echocardiogram[73]
07.08.2026FACT Clinic TARGET oncologist (Dr. Kolachko)Disease-history summary confirming progression; recommends PD-L1, MSI, NTRK, BRAF statusSecond opinionconclusion[74]
20.08.2026FACT FoundationOne Liquid CDx (blood)ctDNA fraction 32 %; exon 11 Q556_V559>H 17.0 %, exon 13 V654A 8.8 %, exon 18 A829P 4.0 %; imatinib, sunitinib, avapritinib resistant; regorafenib NCCN 1Polyclonal KIT resistance explainedFoundationOne report[75]
08.09.2026FACT LISOD oncologist conclusion (Dr. Yermakov) after the FoundationOne resultFormulated diagnosis updated with the KIT exon 11, 13 and 18 mutations; recommendation: sunitinib 50 mg days 1–28 + 2 weeks off, and — new, on the basis of FoundationOne — regorafenib 160 mg days 1–21 q28 as an option; oncologist review with PET-CT or contrast CT after 3–4 cyclesSunitinib re-confirmed, regorafenib added — neither startedLISOD conclusion 08.09[76] · Ukrainian original[76]
10–11.09.2026OPINION Interventional-radiology opinion, Dr. O. Korshak (Shalimov Centre of Surgery and Transplantology, Kyiv), messenger consultation; histotripsy discussedRFA/MWA contraindicated: contact with the left portal branch and the left bile duct; TARE not done in Ukraine; histotripsy judged new, very expensive and unproven for GIST and for lesions of this size — ask HistoSonics (HCA price list 11.09.2026)TACE / TARE / SBRT / IRE / resection / histotripsy under discussionhistotripsy EU approval
15.09.2026OPINION Interventional-oncology call, ULIS Clinic (Zaporizhzhia)Electrochemotherapy technically unsuitable (electrode depth 4–6 mm); RFA possible only if ultrasound navigation shows the active focus and a safe applicator path; chemoembolisation theoretically possible, needs angiography and vascular accessRFA conditional on in-person ultrasoundcall summary
17.09.2026OPINION Oncology consultation, Dr. Esther Tahover (Tel Aviv Sourasky / Ichilov)Imatinib has failed — start a second-line TKI now: sunitinib or ripretinib (she endorses both; sunitinib first only because it is available), regorafenib a good but less well tolerated alternative; no drug covers exons 11 + 13 + 18; combinations, immunotherapy, bezuclastinib and HSP90 inhibitors not recommended outside research; interventional radiology first for the liver (RFA / TACE / SIRT / external radiotherapy). Ripretinib obtainable on an Israeli prescription — price corrected by the clinic to ₪110,985.51 ≈ US$36,583 per monthSunitinib recommended; reassess at 3 months with PET-CTconsultation summary
18.09.2026OPINION Surgical consultation, Dr. Denys Fedorov (Ukraine)Two-stage liver resection feasible and potentially radical: right hemihepatectomy (dominant mass + segment I), then the segment II/III focus or whole segment III after regeneration; never in one stage (liver-failure risk). Open question: depth of invasion into the left hepatic vein and segment III branches. Palliative debulking acceptable but not radical. Sceptical about embolisation, radioembolisation, histotripsy, electrochemotherapyResection under evaluation; fresh PET-CT, then workup and staging laparoscopyconsultation summary
23.09.2026FACT FDG PET-CT (KMKOC, Kyiv; GE Discovery STE16; low-dose non-contrast CT)Increased metabolic activity in multiple liver foci versus 19.06.2026 — progression. Largest right-lobe lesion 98 × 148 mm, ametabolic core with peripheral and internal metabolic ingrowth, SUVmax up to 4.9; left-lobe active area up to 35 × 54 mm (confluent); active focus up to 15 × 24 mm in segment S8. Gastric lesion stable and FDG-negative (43 × 32 mm); uterine lesions stable (67 × 49 mm, SUVmax 1.8; ametabolic node 37 × 47 mm). New oesophageal uptake SUVmax 2.0–3.2 — endoscopy advised. No bone lesionsProgression in the liver (metabolic)report 23.09 (EN) [hosted copy] · Ukrainian original [hosted copy] · DICOM disc
29.09.2026OPINION Oncology consultation by phone, Prof. A. Czarnecka (Onkolmed; National Institute of Oncology, Warsaw); opinionRegorafenib (already chosen at LISOD, to be received the next day): "not a bad choice"; she did not prescribe it. Local treatment of the liver foci "not a standard approach"; with multiple liver metastases her centre does not recommend surgery; standard path is next-line drugs (in Poland sunitinib; regorafenib not available there); sunitinib "not really active" against A829P; ripretinib "very expensive"; for local treatment, liver-surgery centres (names in the summary). Before the 05.10.2026 proceduresRegorafenib: "not a bad choice" (already chosen at LISOD; not prescribed by her); no trial proposedconsultation summary
30.09.2026FACT Regorafenib dispensed/received; not started (as of 30.09.2026) (not started; held because surgery is expected soon; family report, 14.10.2026); LISOD baseline blood testsRegorafenib (Stivarga) 40 mg tablets × 84 received (one 21-day cycle at 160 mg/day) — not yet started. Blood count: RBC 3.49 (L), MCV 101 (H), Hb 121, WBC 5.4, platelets 216, lymphocytes 1.1 (L). Biochemistry: AST 33.1 (H, limit 32), ALT 20.1, bilirubin 4.5, LDH 278.8 (H), creatinine 86.5 (H; eGFR ≈ 70), glucose 6.9 (H), ionised calcium 1.10 (L)Second line dispensed, not started; held because surgery is expected soon (family report, 14.10.2026)results (EN) · CBC original · biochemistry original
01.10.2026FACT InVivo Clinic laboratory: creatinine and urinalysisCreatinine 71.7 µmol/L (InVivo reference 41–73; eGFR ≈ 88) — within range; the LISOD value on 30.09.2026 was 86.5 (flagged high; different laboratory and reference range). Urinalysis within range: no protein, glucose or blood; microalbumin/creatinine 0.56 mg/mmol (up to 3.4); urine calcium 5.0 mmol/L; no casts, crystals or bacteria; squamous epithelium 5–6 per field (usually contamination)Kidney function normalresults (EN) · original (PDF)
05.10.2026
report 13.10.2026
FACT Diagnostic laparoscopy, Shalimov National Scientific Center of Surgery and Transplantology, Kyiv: incisional biopsy of the gastric lesion; ultrasound-guided trepan biopsy of the focal lesion in liver segments II–IIIGastric fragment 1.5 × 1 × 1.5 cm: hyalinised tissue without viable tumour cells, "may be a consequence of the therapy". Liver cores: GIST metastasis, spindle-cell variant, low grade; CD117 and DOG-1 positive, Ki-67 2 % (IHC on the liver material only). No mitotic count, no mutational analysisViable GIST in the liver lesion; none in the gastric sampleEnglish translation[195] UA original
05.10.2026
examined 06.10.2026
FACT Cytology of the ascitic fluid taken at the laparoscopy, Shalimov National Scientific Center of Surgery and Transplantology (form 203/o, No. 996/26)Shalimov cytology: category V, "signs of metastasis of a malignant process"; no cell block or IHCNot reproduced on review of the same slides, 14.10 (AUS)English translation[196] UA original
13.10.2026OPINION Telegram messages from the Shalimov pathologist and Dr D. Fedorov (informal opinions)Pathologist: GIST metastasis confirmed, Ki-67 repeated; further genetics not now (oncologist Dr O.M. Latsinnikova); paraffin blocks only; no living cells in the gastric fragment. Dr Fedorov's statement on the cytology: see the messagesInformal, verbalmessages (chat not published)
05–13.10.2026
signed 13.10.2026
FACT Discharge from the Shalimov Centre (hospitalisation 05–13.10.2026), written summary (form 027/o)Diagnosis as written: C78.7 GIST of the stomach cT2N0M1 (hep), KIT exon 11 mutation, stage IV; comorbid: uterine leiomyoma, right ovarian endometrioma, type 2 diabetes, iron-deficiency anaemia. EGD 02.10.2026: erythematous gastropathy, duodeno-gastric bile reflux. Colonoscopy 02.10.2026: single (3) colon neoplasias (histology not stated). Thermal ablation of the left-lobe focus "technically inadvisable". Post-operative period without complicationsDischarged in satisfactory condition; review after the oncology consiliumEnglish translation[201] UA original
14.10.2026FACT CSD LAB (Kyiv): review of the Shalimov ascitic-fluid slides 996/26 (2 slides, Pappenheim), requested by Dr O.M. LatsinnikovaReview of the same slides: AUS; category V not reproduced; no cell block (Ascitic fluid cytology)Malignancy in the fluid not establishedEnglish translation[197] UA original
16.10.2026OPINION Surgical consultation by phone, Dr D. Fedorov (Shalimov NSCST), reporting the tumour-board (MOK) decisionMOK approved surgery. Two-stage plan: right hemihepatectomy first (rupture risk of the fluid-containing right-lobe lesion; mostly non-functioning tumour), left-lobe lesion at the second stage; stomach tumour in the same operation if a local resection suffices. No local treatment of the left-lobe lesion now. Operation possible "this Wednesday" (INTERPRETATION 21.10.2026). Imatinib "not now", resumed after surgery; CT about 2 weeks after surgerySurgery planned (opinion)consultation summary
20.10.2026OPINION Surgical consultation by phone, Dr D. Fedorov; patient already in hospital (family statement)Planned operation: right hemihepatectomy; stomach tumour in the same operation where possible, otherwise at the second stage. Hospital stay at least 1–1.5 weeks. Risks named: deviation from the plan, intra-operative rupture, bleeding, wound infection. Specimen to the clinic's pathology laboratory (standard protocol)Pre-operative briefing (opinion); no date statedconsultation summary
20.10.2026Telephone call with a tumour-tissue bank (Biotherapy International, Tel Aviv) about keeping living tumour tissue (family report; company statements)Living tissue can be stored only in their Tel Aviv bank (quoted $3,600 for up to 3 years, paperwork $600–$700, transport $2,500–$4,500); needs an Israeli import permit (1–2 months) and courier transport, with no logistics partner in Ukraine; family decided on formalin fixation only (summary)Not pursuedfamily report, 20.10.2026
20.10.2026Imatinib stopped before the operation (family report)Imatinib 400 mg/day stopped 20.10.2026 before surgery; restart a few days after the operation, timing to be discussed with the surgeon/oncologist. Regorafenib (dispensed 30.09.2026) not started, not allowed currentlyPre-operative drug stopfamily report, 20.10.2026

Imaging over time (from the written reports)

Compiled from the radiology reports (as summarised in the OpenEvidence review of 05.09.2026, cross-checked against the reports). Findings are report text, not independent DICOM measurements; different readers, planes and lesion labels limit direct comparison.

The critical 2026 change is the return of enhancing, FDG-active tissue inside residual liver masses, not a large increase in their size. The reports do not establish that the inactive 2025 mural nodule and every 2026 active nodule are the same focus. The PET-CT of 23.09.2026 (KMKOC) shows further metabolic progression — increased FDG activity in multiple liver foci versus 19.06.2026 (SUVmax up to 4.9), a confluent left-lobe active area up to 35 × 54 mm and an active focus up to 15 × 24 mm in segment S8 — with the uterine and gastric lesions stable.

Key size trend (mm)

ScanDominant right-liver massLeft-lobe lesionGastric / upper-abdominal mass
Dec 2022—84 × 5656 × 46
Jan 2023200 × 130 × 180—65 × 50
Feb 2023184 × 114 × 16065 × 4555 × 40
Apr 2023~190 maximum7558 maximum
Jun 2023172 × 106 × 15052 × 4047 × 35
Aug 2023160 maximum5044 maximum
Mar 2024150 maximum4540 maximum
May 2025135 × 100 primary; 135 re-read—33 × 28 primary; 35 re-read
Jun 2026144 × 104 × 141 (Israel: ~150 × 100)45 × 36 (Israel 42 × 36; own CT measurement 46 × 48 × 42)43 × 33 × 44 (Israel 37 × 31)
Sep 202698 × 148 (ametabolic core, peripheral/internal metabolic ingrowth, SUVmax ≤ 4.9)35 × 54 metabolic (confluent); S8 focus 15 × 2443 × 32 (FDG-negative, stable)
Imaging chronology, scan by scan
Scan date / modalityChange and principal findingsSource
23 Aug 2022 — contrast CTBaseline: bilobar liver masses with central necrosis and peripheral vascularity; liver height 198 mm. Mass above the pancreatic tail adjacent to the stomach 51 × 46 mm — the original conclusion already listed GIST in the differential. Anterior/fundal pelvic mass 93 × 63 mm; right adnexal probable haemorrhagic cyst 67 × 57 mm. Lung nodules ≤ 3 mm.report[1] UA original
24 Aug 2022 — CT/MRI; 14 Oct 2022 — MRIDominant liver lesion 170 × 110 mm in August. October MRI: hepatic progression, left upper-abdominal deposit enlarged to 74 × 60 mm, uterine mass broadly stable; RECIST 1.1 progressive disease.MRI 25.08[2] UA original · MRI 14.10[5] UA original: MRI_14_10_1.jpg · UA original: MRI_14_10_2.jpg
Dec 2022 — German second reading of the contrast CT (RNI Neu-Isenburg)Right-lobe metastases 19 × 12 cm axial, 17 cm craniocaudal, confluent, with incipient compression of the common hepatic duct and early intrahepatic cholestasis; exophytic growth along segment 4; mass caudal to the pancreatic tail 5.2 × 6.1 cm and pelvic masses 8.5 × 10 cm and 6 × 5 cm (probable subserosal myoma); no lung metastases; thin pericardial effusion; small tracheal lipoma.translation[10]
1 Dec 2022 — contrast CTHepatic enlargement versus August: liver height 220 mm; S8 lesions 94 × 63 mm (was 79 × 56); left-lobe lesion 84 × 56 mm (was 66 × 48); upper-abdominal mass 56 × 46 mm. Fundal mass decreased to 87 × 64 mm.report[7] UA original
4 Jan 2023 — contrast CTReported as no visible change versus December despite different measurements: dominant hepatic mass 200 × 130 × 180 mm, upper-abdominal mass 65 × 50 mm, liver height 242 mm; minimal bile-duct dilation; brain without enhancing focus. Precedes pazopanib (5–12 Jan).report[13] UA original
9 Feb 2023 — contrast CTAfter pazopanib withdrawal: regression — dominant liver lesion 184 × 114 × 160 mm, left-lobe lesion 65 × 45 mm, upper-abdominal mass 55 × 40 mm, liver height 210 mm; about 12 % liver-lesion regression and 15 % implant reduction per the radiologist.report[29] UA original
11 Apr 2023 — contrast PET-CTAfter trabectedin: slight enlargement with active solid peripheral components — dominant liver mass about 190 mm, left-lobe mass 75 mm, liver SUVmax 11.1; gastric-wall mass 58 mm, SUVmax 8.2. This discrepancy prompted reconsideration of a gastric GIST primary.report[37] UA original · Israeli revision[38] RU original
28 Jun 2023 — contrast CT (re-read 28 Jul)During imatinib: regression — dominant hepatic lesion 172 × 106 × 150 mm, predominantly cystic; left-lobe lesion 52 × 40 mm; gastric-region mass 47 × 35 mm (liver −18 %, gastric −28 % versus April). Fundal probable pedunculated myoma 90 × 70 mm.report[56] UA original
17 Aug 2023 — contrast PET-CTMarked response to imatinib: liver lesions almost completely lost active peripheral solid components, residual uptake near liver background. Dominant mass 190 → 160 mm, left-lobe mass 75 → 50 mm; gastric mass 58 → 44 mm, almost fluid, no increased uptake. Inactive uterine mass 72 → 96 mm. A few new 2–3 mm lung nodules.report[59] UA original
14 Mar 2024 — contrast PET-CTContinued control: dominant mass 160 → 150 mm, left-lobe mass 50 → 45 mm, gastric mass 44 → 40 mm; no active components or new lesions; uterine mass 96 → 78 mm; lung nodules stable.report[60] UA original · Israeli revision[61] RU original
13 May 2025 — contrast PET-CT; LISOD re-read 19 MayPredominantly cystic, inactive remnants; dominant lesion 150 → 135 mm; gastric lesion 40 → 35 mm with calcifications. New 11 mm dense mural nodule in an S8 liver lesion without focal FDG increase (possible haemorrhage, follow-up advised). Uterine mass 78 → 84 mm. Primary report: "PET negative".primary report (UKR)[67] original · LISOD re-read (UKR)[68] original
19 Jun 2026 — contrast PET-CT, primary reportRead as no definite negative change: dominant liver lesion 144 × 104 × 141 mm, left-lobe lesion 45 × 36 mm, gastric lesion 43 × 33 × 44 mm with increasing calcification; liver height 179 → 187 mm; uterine mass 68 × 55 × 48 mm stable; pelvic MRI suggested.translation[70] UA original
Same scan — LISOD re-read 8 Jul 2026Different interpretation: sizes broadly stable, but new mural nodules with enhancement and moderately increased focal FDG activity — left-lobe nodule SUVmax 3.2 vs adjacent liver 2.0; suspicious for return of viable GIST. Also a new 31 mm right femoral-head lucency with sclerotic rim, not diagnosed as metastasis.translation[71] UA original
Same scan — Israeli expert reading 8 Sep 2026Metabolic progression, especially the left-lobe lesion (42 × 36 mm, uptake increased); right-lobe mass about 15 × 10 cm (from 11–12.5 cm) with somewhat increased peripheral uptake; gastric lesion 37 × 31 mm unchanged; no bone lesions.translation[77]
23 Sep 2026 — FDG PET-CT (KMKOC, low-dose non-contrast CT)Metabolic progression versus 19.06.2026: activity along the contour and inside several ametabolic liver lesions, SUVmax up to 4.9; left-lobe active area 35 × 54 mm (confluent); focus 15 × 24 mm in S8; right-lobe lesion 98 × 148 mm; gastric lesion 43 × 32 mm unchanged; uterine lesions stable; oesophageal uptake SUVmax 2.0–3.2; no bone lesions.translation [hosted copy] · original [hosted copy]

Imaging discs (DICOM) on Google Drive

All original image data, in one place. Discs cannot be hosted on the site (0.3–2.3 GB each); the traces and sheets on this page were computed from them.

DateStudyDisc folderUsed on this site forReport
23 Aug 2022Contrast CT of the abdomen and pelvis, 4 phases (native, arterial, venous, delayed); pelvic MRI of 25 Aug 2022 on the same discaug_22venous phase: baseline for the 2022–2023 mass seriesCT 23.08.2022[1] UA original · MRI 25.08.2022[2] UA original
14 Oct 2022MRI of the abdomen and pelvis (eFilm disc, multi-frame series)oct_14not used for tracing (MRI)MRI 14.10.2022[5] UA original: MRI_14_10_1.jpg · UA original: MRI_14_10_2.jpg
1 Dec 2022Contrast CT of the chest, abdomen and pelvisDec_12022–2023 mass seriesCT 01.12.2022[7] UA original
4 Jan 2023Contrast CT of the brain, chest, abdomen and pelvis (zip archive)Jan_04_20232022–2023 mass seriesCT 04.01.2023[13] UA original
13 Jan – 16 Jun 2023Brain MRI series (20 Sep 2022 baseline, 13 Jan, 20 Jan, 16 Jun 2023)Brain_MRIPRES montages (FLAIR, SWI)MRI 13.01.2023[15] UA original · MRI 20.01.2023[19] UA original: MRI_Brain_20_Jan_2023.jpg · UA original: MRI_Brain_20_Jan_2023_2.jpg · MRI 16.06.2023[54] UA original
9 Feb 2023Contrast CT (after pazopanib withdrawal)Feb_09_20232022–2023 mass seriesCT 09.02.2023[29] UA original
11 Apr 2023FDG PET-CT with contrast (PET not SUV-calibrated on the disc)APR_11_2023_PET_CTliver, gastric and uterine traces; CT/PET sheetsPET-CT 11.04.2023[37] UA original
28 Jun 2023Contrast CT and MRI (first study on imatinib)28_06_2023_CT_and_MRI2022–2023 mass seriesCT 28.06.2023 (re-read 28.07)[56] UA original
17 Aug 2023FDG PET-CT with contrastAug_17_2023_PET_CTliver, gastric and uterine traces; sheetsPET-CT 17.08.2023[59] UA original
14 Mar 2024FDG PET-CT with contrastMar_14_2024_PET_CTliver, gastric and uterine traces; sheetsPET-CT 14.03.2024[60] UA original · Israeli revision[61] RU original
13 May 2025FDG PET-CT with contrast (SUV-calibrated)May_13_2025_PET_CTliver, gastric and uterine traces; sheetsPET-CT 13.05.2025[67] original · LISOD re-read 19.05.2025[68] original
19 Jun 2026FDG PET-CT with contrast (SUV-calibrated)June_19_2026_PET_CTleft-lobe analysis, whole-body model, all tracesPET-CT 19.06.2026[70] UA original · LISOD re-read 08.07.2026[71] UA original · Israeli expert reading 08.09.2026[77]
23 Sep 2026FDG PET-CT, low-dose non-contrast CT (KMKOC, Kyiv; GE Discovery STE16)Sep_23_2026_PET_CTlatest study; segmentation, FDG-active volumes and 3D model of September 2026PET-CT 23.09.2026 (EN) [hosted copy] · Ukrainian original [hosted copy]

Biopsies and pathology

Eight tissue examinations (the latest on 05.10.2026), one cytology of ascitic fluid (05.10.2026; slides reviewed at CSD LAB on 14.10.2026) and one liquid biopsy (ctDNA) underpin the diagnosis and the resistance profile; the genetic tests run on that tissue, the germline panel and the expert interpretations of the genetic results are listed in the same table, in date order (full variant list: all genomic findings). None of the 2022–2023 reports states which liver lobe or segment was punctured (the January 2023 report gives only the lesion size, 5 cm); the report of 13.10.2026 is the first to name one (segments II–III).

DateProcedure and siteResult
29 Aug 2022FACT Trephine (core) biopsy of a liver metastasis, National Cancer Institute (block 48278/22) — report[3] UA original: biopsy1.jpg · UA original: biopsy2.jpg · UA original: биопсия_метастаза.jpeg · tumour board 31.08.2022[4] UA original"More data for metastases of leiomyosarcoma; liver tissue not detected in the material." No immunohistochemistry (too little material). Basis of the leiomyosarcoma diagnosis. The block (48278/22) was later used for the Oncomine genomic test (06.01.2023, row below).
13 Dec 2022FACT Second liver-metastasis biopsy (Life Code / Medihealth, Vinnytsia) — pathology 23.12.2022[9]Three 0.1 cm fragments: necrotic tissue, erythrocytes and a minute fragment of connective tissue — no tumour; the biopsy was uninformative.
15 Dec 2022 – 6 Jan 2023FACT Genetic test on the August 2022 liver-biopsy block 48278/22 (~80 % tumour cells): Oncomine NGS DNA/RNA panel, CSD laboratory, Kyiv — Oncomine results (report)[11] · Ukrainian original · raw sequencing files (BAM, DNA and RNA): note · files on Drive (about 25 GB; not hosted here)KIT exon 11 deletion c.1668_1676delGTGGAAGGT (p.Q556_V559delinsH), allele fraction 42.5 % — the driver, sensitive to KIT inhibitors (OncoKB 3B). Also KIF5B–MET fusion (RNA, subclonal), TPMT variants (pharmacogenetic), PPM1D Q360H, no NTRK fusion; TMB low (4.82 mutations/Mb), microsatellite stable. The KIT finding was reported about three and a half months before the pathology diagnosis of GIST (21.04.2023).
15 Dec 2022 – 6 Jan 2023FACT Germline (hereditary) panel BRCA Plus — BRCA1, BRCA2, CHEK2, PALB2 (CleanPlex Hereditary Cancer Panel v2), CSD laboratory, Kyiv — report[12] · Ukrainian originalNo pathogenic or likely pathogenic variants in the four genes studied (the report does not state the specimen).
18 Jan 2023COMMENTARY Genetic commentary on the Oncomine results (NCCN-based), CSD laboratory — commentary (English)[18] · Word · Russian originalNo NTRK fusion and no BRCA1/2 mutation (so no basis for larotrectinib/entrectinib or PARP inhibitors); microsatellite stable with low mutation burden, so immunotherapy is not indicated; recommends extended (>300-gene) profiling before second-line therapy. Written while the diagnosis was still leiomyosarcoma.
24 Jan 2023FACT Percutaneous ultrasound-guided trephine biopsy of a 5 cm liver lesion, Oberig clinic (block 202/23) — IHC report 30.01.2023[23] UA original · discharge summary[22] UA originalMorphology and immunophenotype "in favour of metastatic leiomyosarcoma of the uterus, status after systemic treatment". The 2022 block re-examined alongside. This sample was later judged insufficient for genomic testing and for the Israeli revision.
9 Mar 2023FACT Molecular tumour board, University Center for Tumor Diseases Mainz (held 06.03.2023) on the Oncomine and hereditary-panel findings — conclusion (English)[35] · German originalFirst approach: MET inhibitor for the KIF5B–MET fusion (evidence level m2A); second approach: multikinase inhibitor for the KIT exon 11 deletion. BRCA1/2, CHEK2, PALB2 wild type.
21 Apr 2023FACT Endoscopic ultrasound with fine-needle aspiration of the paragastric mass (three punctures) and trephine biopsy of the abdominal-cavity mass, LISOD — EUS-FNA[40] UA original · pathology[41] UA original · advisory conclusion[39]Paragastric formation extending to / originating from the muscular layer of the gastric wall. Pathology: gastrointestinal stromal tumour of the stomach (ICD-O 8936/3); DOG-1 positive, CD117 (c-kit) positive, desmin negative.
25 Apr 2023FACT Core (trephine) biopsy of a liver metastasis, LISOD — pathology 26.04.2023[42] UA originalGIST metastasis in the liver; CD117 positive, DOG-1 positive.
4 May 2023FACT Re-assessment of the very first (August 2022) liver biopsy, slide 48278/22 — pathology[44] UA originalNot enough material in the block, so IHC was done on half of the original slide: CD117 positive, DOG-1 positive — GIST metastasis; the 2022 leiomyosarcoma reading is thereby revised.
4 Jun 2023FACT Revision of all three 2023 samples, Prime Pathology / Manor Medical Center, Israel — report[49] RU originalIsraeli histology revision confirms GIST in all three samples. Abdominal biopsy: cellular spindle-cell tumour, DOG1, CD34 and c-kit positive, with SDH-B deficit; liver biopsies: same morphology, DOG1 and c-kit positive — metastatic GIST. The SDH-B loss alongside a KIT mutation was flagged as unusual (see OpenEvidence review, question 11).
20 Aug 2026FACT Liquid biopsy: FoundationOne Liquid CDx on blood (ctDNA), Foundation Medicine / Roche — report[75] · clinical summary · full textctDNA tumour fraction 32 %; KIT exon 11 Q556_V559>H (VAF 17.0 %) with secondary exon 13 V654A (8.8 %) and exon 18 A829P (4.0 %); BRCA2 T3085fs*26 (1.5 %), CDKN2A rearrangement (12.8 %), MTOR A1459D (0.21 %); bTMB 3 Muts/Mb, MSI-high not detected. No tissue was sampled; whether the two resistance mutations are in separate cells cannot be resolved from blood.
5 Oct 2026
report 13 Oct 2026
FACT Diagnostic laparoscopy with incisional biopsy of the gastric lesion and ultrasound-guided trepan biopsy of the focal lesion in liver segments II–III, Shalimov National Scientific Center of Surgery and Transplantology, Kyiv (department IV; inpatient card 9577; material 4222/26; restated in the discharge summary of 13.10.2026 English translation[201] UA original) — English translation[195] UA originalGastric fragment, 1.5 × 1 × 1.5 cm: hyalinised tissue without viable tumour cells, "which may be a consequence of the therapy given"; no IHC reported on it. Liver, two cores (0.7 × 0.2 × 0.2 cm in total): GIST metastasis, spindle-cell variant, low grade; CD117 (c-kit) positive, DOG-1 positive, Ki-67 2 %. No mitotic count and no mutational analysis reported. The form gives the year of birth as 1971 (the patient was born in 1976).
5 Oct 2026
reviewed 14 Oct 2026
FACT Cytology of the ascitic fluid taken at the same laparoscopy (Shalimov No. 996/26), reviewed at CSD LAB (26NGC012870)Category V (Shalimov) not reproduced on review of the same slides (CSD LAB: AUS) — malignancy not established; comparison: Ascitic fluid cytology

Pathology and imaging, 05.10.2026. Gastric lesion: FDG-cold on every PET-CT since August 2023 and increasingly calcified (23.09.2026: 43 × 32 mm, FDG-negative); the biopsy fragment was hyalinised tissue without viable tumour cells, consistent with treatment effect. It is a single incisional fragment, so viable tumour elsewhere in the lesion is not excluded. Liver: the punctured "focal lesion Sg II–III" corresponds by location to the left-lobe lesion (segments II/III), the lesion that became FDG-active in June 2026 and grew in activity by September; the report gives no size or image reference, so the match rests on the segment alone. That lesion is viable GIST with low proliferation (Ki-67 2 %, low grade).

Compared with the earlier pathology. No earlier report gives a Ki-67 value, so 2 % is the first. Mitoses were reported on the earlier liver material: 5 per 10 high-power fields on the August 2022 slide 48278/22, taken before any KIT inhibitor (report of 30.01.2023), and "mitotic figures" on its re-examination of 04.05.2023; the January 2023 liver biopsy, taken after chemotherapy, had no increased mitotic activity and no mitoses on PHH3 staining. The 21.04.2023 gastric sample could not be graded (too little tumour). The 2026 report gives a grade (low) but no mitotic count, so the figures are not directly comparable. Morphology (spindle cells) and immunophenotype (CD117 and DOG-1 positive) match the 2023 samples.

Open points from the 05.10.2026 reports.

FACT Ascitic fluid cytology (taken 05.10.2026)
Shalimov Centre, 06.10.2026 (cytologist Tumasova K.P.)CSD LAB, 14.10.2026 (cytopathologist Botsiun P.M.)
MaterialAscitic fluid taken at the laparoscopy; 3 preparations, Romanowsky–Giemsa2 slides of the same material, Pappenheim — a review of the Shalimov slides, not a new sample (whether a third slide exists is not known); low-quality sample; no cell block
Cells describedDetritus, lysed erythrocytes, few lymphocytes, macrophages, reactive mesothelial clusters; small clusters with marked nuclear polymorphism, atypia and signs of malignancyMesothelial groups, lymphocytes, histiocytes; single dense groups of small, relatively monomorphic cells of undetermined origin; no pleomorphic cells described, even within the clusters
ConclusionCategory V: "signs of metastasis of a malignant process" (classification not named)AUS — atypia of undetermined significance (IRSSFC, as written); the origin of the dense cell groups cannot be determined

What this means. The two reads of the same slides disagree: category V was not reproduced on review. Malignancy in the fluid is therefore neither established nor excluded. Cytology of new fluid with a cell block and IHC (CD117, DOG-1) is the way to settle it. Any decision on surgery rests with the treating team.

Reports: Shalimov — translation[196] · UA original; CSD LAB — translation[197] · UA original.

Ascites and the peritoneum on record:

Documents to request from the Shalimov Centre.

OPINION Doctors' messages after the 05.10.2026 procedures (13.10.2026, Telegram chat; informal)

Short paraphrases of chat messages to the family; opinions, not reports. Every line: opinion / chat, 13.10.2026.

Next steps named so far (from the documents and these messages; not a recommendation of this site):

The PRES episode (January 2023)

Pazopanib caused posterior reversible encephalopathy syndrome with a left occipital haemorrhage on day 8; the changes largely resolved by June 2023. This is why potent VEGFR inhibitors carry extra risk for her. Details, reports and the four brain MRIs:

Brain MRI story: reports, FLAIR and SWI montages, lesion markings

Pazopanib 800 mg was started on 5 January 2023 on the basis of the Oncomine findings. On day 8 the patient developed severe headache, confusion and loss of consciousness and was admitted to the Oberig clinic (13–25 January 2023; discharge summary[22]). Pazopanib was stopped, pulse steroid therapy was given, and the brain MRI was repeated a week later and again in June 2023. The four MRIs are on Drive under anastasia_disks/Brain_MRI.

DateStudyRadiological conclusion
20 Sep 2022Brain MRI (Philips 1.5 T), baselineNo written report in the archive; the FLAIR images show no focal cortical lesion (baseline before any targeted therapy).
13 Jan 2023Brain MRI 1.5 T — report[15] UA original · second expert reading[16] UA originalDiffuse-focal cortico-subcortical changes in both hemispheres; differential: inflammatory/autoimmune process (vasculitis), less likely metastases or CNS lymphoma; no fresh haemorrhage seen. The second reading suggested PRES as a known pazopanib side effect.
20 Jan 2023Brain MRI 3 T with MR angiography — report[19] UA original: MRI_Brain_20_Jan_2023.jpg · UA original: MRI_Brain_20_Jan_2023_2.jpg · second specialist[20] UA originalChanges predominate in both occipital lobes; new cytotoxic oedema of the parietal cortex; intracerebral haemorrhage of the left occipital lobe; multifocal vasoconstriction. Typical of PRES with intracerebral haemorrhage and cerebral vasculopathy.
9 Feb 2023Neuroradiology second opinion — University Hospital Freiburg[28] DE originalThe changes are a typical consequence of tyrosine-kinase-inhibitor therapy (PRES), not metastases.
16 Jun 2023Brain MRI — report[54] UA originalPathological changes significantly decreased in intensity and extent; the left occipital haemorrhage smaller and transformed; consistent with the consequences of PRES.
FLAIR brain MRI at four dates
Figure 7. FLAIR images at four approximately matched levels (vertex to ventricles) on 20 Sep 2022 (baseline), 13 Jan 2023 (acute PRES: bright cortical/subcortical patches in both hemispheres, frontal-parietal and occipital), 20 Jan 2023 (occipital predominance with the left occipital haemorrhage ring) and 16 Jun 2023 (near-complete resolution). Images as stored: anterior up, patient right on image left. Levels are picked by position within the scanned brain, so they match only approximately between scanners.
FLAIR with automatic lesion outlines
Figure 7b. The same FLAIR levels with an automatic outline of hyperintense cortical/subcortical lesions (orange, more than 3 MAD above the parenchymal median). 13 Jan: right frontal-parietal and bilateral occipital patches; 20 Jan: fewer, smaller foci and the ring of the left occipital haemorrhage; 16 Jun: nothing above threshold. Outlines were checked visually; the baseline scan carries no outlines by design.
SWI brain MRI at three dates
Figure 8. Susceptibility-weighted images (blood products appear dark) on 13 Jan, 20 Jan and 16 Jun 2023: the left occipital haemorrhage is the dark ring in the third and fourth columns on 20 Jan, with residual dark foci in June.
SWI with haemorrhage marks
Figure 8b. The same SWI levels with the left occipital haemorrhage marked (red: automatic outline of the compact dark blood-product focus; dashed red circle: darkest compact focus in the left posterior brain). 13 Jan is left unmarked, as the reports found no haemorrhage on that day.

Imaging analysis of the 23.09.2026 PET-CT

Study: KMKOC, GE Discovery STE16; low-dose non-contrast CT (1.37 × 1.37 × 3.27 mm) and FDG PET, 83 min uptake. Radiologist's conclusion: original (Ukrainian, scanned PDF) · English translation. Materials: DICOM disc and reports on Drive · 3D liver, three dates · older single-scan 3D model · imaging report PDF (27.09.2026)

Method. The radiologist's report and automatic organ maps were used only as starting points. Every structure was outlined slice by slice by AI segmentation agents and then checked by independent adversarial reviewer agents that re-rendered every slice and tried to refute each outline. Each outline was corrected until it passed review (all passed on the second review). Reference levels: liver background SUV 1.97 ± 0.63, FDG-active threshold 3.24 (liver mean + 2 SD), blood pool 1.58 (report: 1.6). Images use the radiological convention (patient right on the image left, anterior up).

This is an auto-generated, AI-assisted analysis, not a radiology report. The written report of 23.09.2026 is authoritative. Without contrast, vessels, bile ducts and small or isodense lesions cannot be assessed.
Structure23.09.2026 (own measurement)19.06.2026Radiologist 23.09.2026
FDG-active tissue, left lobe (segments II/III)36.3 mL; 60 × 29 mm axial, 52 mm craniocaudal; SUVmax 6.66, 3.4 × liver; confluent with the lesion's medial side19 mL; SUVmax 2.27, 2.2 × livermetabolic area 35 × 54 mm, confluent; SUVmax 4.9 (whole liver)
Left-lobe lesion, CT outline35 ± 4 mL; 45 × 30 mm axial, 56 mm craniocaudal27 mL; 46 × 48 × 42 mm—
FDG-active focus, segment S8 (new)4.1 mL; 23 × 13 mm axial, 29 mm craniocaudal; SUVmax 6.75, 3.4 × liver; inside the hypodense upper lobule of the right-lobe massnot active15 × 24 mm focus inside an ametabolic area
FDG-active wall of the right-lobe mass9.7 mL in 9 foci. The largest is the anterolateral plaque, 6.8 mL, SUVmax 6.02, 3.1 × liver; the medial spot next to the IVC is now 0.9 mL5.7 mL plaque (2.6 × liver) + 0.3 mL medial spot"multiple foci of increased FDG"
Dominant right-lobe mass1200 mL; 146 × 116 mm axial, 180 mm craniocaudal; includes the 74 mL segment S8 lobule~1217 mL (same method)98 × 148 mm (the short axis is measured differently; our narrowest slices also give 98 mm)
Other liver lesionsnone found (vessels and fissures excluded; lesions under ~8 mm cannot be excluded without contrast)——
Liver2645 mL——
Gastric-wall lesion (lesser curvature)36 mL; 42 × 31 mm, 52 mm craniocaudal; calcified, FDG-cold (core SUV ≈ 1.1)24 mL trace; 43 × 33 × 44 mm43 × 32 mm, calcified, FDG-negative
Anterior uterine lesion104 mL; 66 × 51 mm; SUV ≈ 1.0 × liver (maxima are bladder-urine spill-over)—67 × 49 mm, SUVmax 1.8
Upper-margin pelvic node23 mL; 43 × 37 × 29 mm (oblique); not FDG-active—ametabolic node 37 × 47 mm

SUV caveats. Our SUVmax (6.66–6.75) is higher than the report's 4.9. The DICOM header gives 230 MBq injected against 260 MBq in the report, which explains about 13 % of the gap. The rest reflects voxel-level maxima vs the reader's ROI. Ratios to liver background are the comparable figure between studies: left lobe 2.2 → 3.4 × liver, mass wall 2.6 → 3.1 × liver. Not assessed here: oesophageal uptake (report: SUVmax 2.0–3.2, EGD advised); it lies outside the liver outline.

Per-lesion volumes on all three dates (consensus masks, with confidence labels): lesion table in the three-date liver viewer.

3D close-up of the left-lobe lesion
Figure S1. 3D close-up of the left lobe: CT lesion outline (cyan) and the FDG-active tissue (yellow), which extends beyond the lesion on its medial/posterior side. Green = right-lobe mass. Blue = portal vein and branches, orange dots = assumed course of the left bile duct (ducts are not visible on CT), red = lesion / left portal branch contact. These three are taken from the 19.06.2026 contrast CT and registered onto this non-contrast study (Figure S14).
Left-lobe FDG-active tissue, axial slices
Figure S2. Left-lobe FDG-active tissue on twelve axial levels: FDG-active tissue in yellow, CT lesion outline in cyan, liver in green.
3D anterior view
Figure S3. Anterior 3D view of the liver: right-lobe mass (green, on the image left = patient right), left-lobe lesion (cyan) and all FDG-active tissue (yellow): the S8 focus at the top of the mass, the anterolateral wall plaque, and small wall foci.
Segment S8 focus, right-lobe mass slices and other 3D views
S8 focus 3D
Figure S4. 3D close-up of the segment S8 focus inside the upper lobule of the right-lobe mass.
S8 focus slices
Figure S5. Segment S8 focus, axial slices.
Right-lobe mass slices
Figure S6. Right-lobe mass outline with FDG-active wall tissue, axial slices.
3D left anterior oblique
Figure S7. Left anterior oblique 3D view.
3D right anterior oblique
Figure S8. Right anterior oblique 3D view.
3D inferior view
Figure S9. Inferior 3D view.
PET maximum-intensity projection
Figure S10. PET maximum-intensity projection with the outlined structures.
Gastric-wall lesion and pelvic lesions (slices)
Gastric lesion slices
Figure S11. Gastric-wall lesion (orange): calcified, FDG-cold. The SUVmax in each panel title is the hottest voxel anywhere in the panel, not in the lesion.
Pelvic slices
Figure S12. Pelvis: anterior uterine lesion (magenta), upper-margin node (cyan), uterus/pelvic complex (green). The right ovarian endometrioma cannot be separated on this non-contrast study. The panel-title SUVmax comes from bladder urine.
How exactly the 3D models match the slice segmentation (check)

Every 3D model is built directly from the reviewed slice masks, without pre-smoothing. Slices are interpolated linearly in the craniocaudal direction, the surface is placed half-way between an in-mask and an out-of-mask voxel, and only light volume-preserving smoothing is applied. Each model was checked by converting it back into voxels and comparing it with its mask. Agreement (Dice, 1 = identical) is 0.98–0.998, volumes agree within 0.5 %, and 95 % of each surface lies within about 1 mm of the voxel boundary (one voxel = 1.37 mm in-plane).

mesh vs slices
Figure S13. Cyan = mask outline on the slice; red dashed = cross-section of the published 3D model at the same level (five levels per structure).
Portal vein and bile-duct course transferred from the June contrast CT (registration check)

The 23.09.2026 CT was done without iodine contrast, so the portal vein and its branches cannot be traced on it. They were traced on the 19.06.2026 contrast CT and transferred onto this study. The June liver, right-lobe mass and left-lobe lesion surfaces were aligned to the September ones (affine fit, then a local rigid refinement around the lesion). After alignment the June lesion surface lies on average 2.4 mm from the September lesion surface, and the liver surface within 60 mm of the lesion 5.3 mm from it. The transferred vessels are therefore approximate to a few millimetres, and they show the June anatomy. The bile duct is not visible on either study: its course is assumed from the portal branch it accompanies.

registration check
Figure S14. Registration check on the 23.09.2026 CT: September lesion (cyan), September FDG-active tissue (yellow), June lesion transferred (magenta dashed), June portal vein transferred (blue).
Interactive 3D liver viewer, opened on 23.09.2026 # — the three-date viewer (13.05.2025 / 19.06.2026 / 23.09.2026) with Sep 2026 selected: switch dates, Compare with the earlier scan, growth map, cuts, and the readers' statements on hover. Open full screen.

What you see: click the date buttons to switch scans; Compare shows the earlier scan as an outline; hover a part to see what the reports say. AI-assisted reconstruction, not a radiology report. Older single-scan model of this scan (fewer structures, colours differ; not for measurements): 23.09.2026 render.

Imaging analysis of the 19.06.2026 PET-CT (10.09.2026)

Materials on Google Drive: analysis folder · imaging report PDF (27.09.2026) · 3D model GLB · DICOM disc of 19.06.2026

The venous-phase contrast CT (2 mm) and the FDG PET of the 19.06.2026 study were fused using the DICOM geometry and reviewed slice by slice. Frame convention: RAS millimetres; images in radiological convention (anterior up, patient left on image right).

These measurements agree with the 08.09.2026 expert reading.

FindingMeasurement
Left-lobe lesion, CT (hypodense, 44 HU vs liver 98 HU)segment II (83 %) / III (17 %); 46 × 48 × 42 mm; 27 mL; centre RAS (−54, 173, −1201)
FDG-active tumour (SUVmax 2.27, liver background 1.04, threshold 1.65)19 mL; about half inside the hypodense core, the rest isodense enhancing tissue on the medial (hilar) side and inferior pole
Left portal branchin contact with the lesion (0.8 mm) and with the FDG-active part (0 mm); contact point RAS (−35, 164, −1200)
Other structuresIVC 31 mm; stomach 19 mm; heart 28 mm; lesion reaches the liver surface (depth 0–31 mm)
FDG-active wall of the right-lobe mass (the "increased peripheral uptake" in the expert reading)SUVmax 2.34 (2.6 × liver background 0.90; threshold 1.59 = liver mean + 2 SD); 5.7 mL plaque along the anterolateral wall, 27 × 24 × 54 mm, soft-tissue density (37 HU vs 15 HU cyst fluid), centre RAS (88, 195, −1220); plus a 0.3 mL spot (SUVmax 1.83) on the medial wall near the portal vein. No other part of the wall or cyst reaches the threshold. Blood-pool uptake is lower (IVC 0.94, portal vein 1.09), so neither spot is vascular spill-over. The intensity equals the left-lobe focus (2.27).
Bile ductsnot resolvable on CT (not dilated); the left hepatic duct runs in the same Glissonean sheath as the left portal branch, so it is within a few mm of the lesion

SUV values differ between readers and reconstructions (LISOD reported a left-lobe SUVmax of 3.2 on the same study); the relative pattern, not the absolute number, is the finding.

Annotated axial and coronal slices
Figure 1. Left-lobe lesion: clean venous-phase CT (top) and the same slices with FDG uptake, CT lesion outline (cyan), FDG-active tumour (yellow), portal vein (blue) and other vessels (green). The left portal branch is the enhancing vessel touching the medial edge of the lesion.
Nine consecutive axial slices through the lesion (Figure 2)
Nine axial slices through the lesion
Figure 2. Nine consecutive axial slices (3 mm apart) through the lesion with the same overlays.
Active wall of the right-lobe mass
Figure 2b. FDG-active wall of the right-lobe mass: twelve axial levels through the 5.7 mL component (cyan outline, SUV ≥ 1.59), mass outline in green, anterior up, patient right on the image left. Shown in yellow in the 3D models.
Left-lobe lesion on the 2024, 2025 and two 2026 PET-CTs
Figure 3. The left-lobe lesion region on the last four PET-CTs (same field and window): CT above, CT with FDG uptake and the lesion outline below. The lesion is present and metabolically silent in 2024–2025, becomes FDG-active in June 2026, and is more active and larger in September 2026 (3.0 × liver on this slice; the 23.09.2026 CT is non-contrast).
Dominant right-lobe mass on all six PET-CTs (Figure 4)
Dominant right-lobe mass on all six PET-CTs
Figure 4. The dominant right-lobe mass through the largest cross-section on all six PET-CTs (24 cm field), with FDG uptake and the mass outline (automated until June 2026; reviewed agent segmentation on 23.09.2026). The mass is a cystic/necrotic residue after treatment; the 2026 activity is confined to its wall.

3D reconstruction

3D close-up
Figure 6. Close-up, left anterior oblique: the FDG-active part wraps the left portal branch.
Interactive 3D liver viewer, opened on 19.06.2026 # — the three-date viewer (13.05.2025 / 19.06.2026 / 23.09.2026) with June 2026 selected (the 19.06.2026 PET-CT, reread by LISOD on 08.07.2026 and by the Israeli revision on 08.09.2026). Open full screen.

What you see: click the date buttons to switch scans; Compare shows the earlier scan as an outline; hover a part to see what the reports say. AI-assisted reconstruction, not a radiology report. Older single-scan model of this scan (fewer structures, colours differ; not for measurements): 19.06.2026 render · download its GLB.

Slice-by-slice verification montages behind the 3D shapes
lesion every slice
Every 2 mm slice through the lesion.
portal vein slices
Portal vein mask, every second slice.
mass slices
Mass and liver masks, every fifth slice.

Gastric-wall GIST (eleven studies 2022–2026), uterus and right ovarian endometrioma (PET-CTs) over time

Method. On each study (gastric mass: five contrast CTs 2022–2023 from the DICOM discs plus six PET-CTs 2023–2026; pelvic masses: the six PET-CTs) the masses were traced slice by slice from a hand-placed seed (soft-tissue density window, air and bone excluded, growth limited to the tissue continuous with the seed), then every traced slice was checked visually (montages under the collapsible headings below). The traced masks give volume, the largest in-plane diameter and the maximum FDG uptake relative to the liver background. The 2023–2024 PET series were not exported in SUV units, so uptake is given relative to liver on all dates. The PET-CTs of 2023–2026 up to June 2026 were acquired with intravenous contrast. The 23.09.2026 study is a low-dose non-contrast CT, and its outlines come from the agent segmentation of that study that passed adversarial review (see the 23.09.2026 analysis), not from the seed tracer; its volumes are therefore not strictly comparable with the earlier traces (see the notes below each table).

Gastric-wall mass (primary GIST site), medial to the stomach at the level of the pancreatic body

StudyMax in-plane diameter, mmVolume, mLMean density, HUMax FDG uptake / liverReported by the radiologists
23 Aug 2022 (CT)555363contrast CT, no PETCT 23.08.2022: 51 × 46 mm above the pancreatic tail, adjacent to the stomach
1 Dec 2022 (CT)536565contrast CT, no PETCT 01.12.2022: 56 × 46 mm; German re-read: 5.2 × 6.1 cm
4 Jan 2023 (CT)527058contrast CT, no PETCT 04.01.2023: 65 × 50 mm, adjacent to the lower gastric body and the pancreatic-tail capsule
9 Feb 2023 (CT)505251contrast CT, no PETCT 09.02.2023: 55 × 40 mm (−15 % after pazopanib)
11 Apr 20235436755.5 × (PET not SUV-calibrated)58 mm, SUVmax 8.2, active (PET-CT 11.04.2023)
28 Jun 2023 (CT)544743contrast CT, no PETCT 28.06.2023: 47 × 35 mm, low density (−28 % on imatinib)
17 Aug 20234846411.8 × (PET not SUV-calibrated)44 mm, almost fluid, no increased uptake
14 Mar 20244935451.3 × (PET not SUV-calibrated)40 mm, inactive
13 May 20254323401.8 ×35 mm, calcifications appearing
19 Jun 20264124381.1 ×43 × 33 × 44 mm (Feofaniya) / 37 × 31 mm, calcified, minimal uptake, unchanged (Israel)
23 Sep 2026 (non-contrast)4136511.2 ×43 × 32 mm, calcified, FDG-negative, stable (KMKOC)

Reading. The gastric-wall tumour grew through chemotherapy (53 → 65 → 70 mL from August 2022 to January 2023, enhancing, 58–65 HU), shrank after the week of pazopanib (52 mL in February 2023) and was intensely FDG-active in April 2023; on imatinib it turned cystic (47 mL and 43 HU by June 2023, almost fluid by August 2023) and then settled at 23–35 mL (about 4 cm) through 2024–2026 with progressive calcification, mean density around 40 HU and uptake at or near liver background. This matches the reports (unchanged, calcified, minimal uptake). Note on April 2023: the enhancing, intensely active mass at the lower gastric body next to the pancreatic tail was traced from its FDG-avid volume (restricted to soft-tissue density), because on CT its enhancement matched the adjacent tissue; the result (about 5 cm, uptake about 5.5 × liver) agrees with the report (58 mm, SUVmax 8.2), but its volume (36 mL) counts only the FDG-avid part and is therefore lower than the CT-defined volumes of the neighbouring dates. The 75 mm left-lobe liver metastasis, which lay 10 cm higher under the diaphragm that month, is a separate object. 23.09.2026: unchanged in linear size (41 mm, as in June) and FDG-cold. The volume of 36 mL against 24 mL in June reflects the method, not growth: the September outline includes the calcified lateral clumps that the June trace left outside.

Gastric-wall GIST on all ten studies
Figure 9. Gastric-wall GIST through its largest cross-section on all eleven studies, 2022–2026 (12 cm field): five contrast CTs (amber titles) and six PET-CTs (cyan titles, with FDG above 1.3 × liver background; the last, 23.09.2026, without contrast). Cyan = traced outline.
3D shape of the gastric-wall mass on the ten dates
Figure 10. 3D reconstruction of the traced gastric-wall mass on the eleven dates at one scale (bar = 2 cm), anterior view.
Gastric-wall mass with ghost organs
Figure 10b. The same masses with ghost organs from the automatic segmentation of each study, clipped to a box around the mass: stomach (lilac), pancreas (sand), spleen (rose), liver edge (pale), left kidney (grey); bar = 5 cm.

Uterus with leiomyomas — the whole organ traced on the six PET-CTs (uterine body plus fibroids)

PET-CTMax in-plane diameter, mmVolume, mLMean density, HUMax FDG uptake / liverReported by the radiologists
11 Apr 2023110107731.8 × (PET not SUV-calibrated)inactive uterine mass 72 mm
17 Aug 202310199761.5 × (PET not SUV-calibrated)96 mm, inactive
14 Mar 202498100751.3 × (PET not SUV-calibrated)78 mm, smaller
13 May 2025108134551.6 ×84 mm
19 Jun 202692153512.4 ×68 × 55 × 48 mm plus upper-margin mass 46 × 37 mm, stable, low activity (Feofaniya); heterogeneous uterine lesions without dynamics (Israel)
23 Sep 2026 (non-contrast)113248312.2 × (bladder-urine spill-over; lesion p95 ≈ 1.0 ×)anterior-wall lesion 67 × 49 mm, SUVmax 1.8, and ametabolic upper-margin node 37 × 47 mm, both stable (KMKOC)

Reading. The violet object is the whole uterus (body plus several fibroids, traced as one organ because fibroid and myometrium cannot be separated reliably on CT); this is why it is larger than the single-fibroid diameters in the reports. On the 2022–2023 contrast CTs only the dominant homogeneous pelvic mass could be traced consistently, so those dates are not included in this series. It stays between 130 and 190 mL with no consistent trend over three years and low uptake (up to 1.5–1.8 × liver; the 2.4 × in June 2026 comes from a bowel loop touching the outline). This is the behaviour of leiomyoma, not of the GIST metastases, and it agrees with the reports ("without dynamics"). Our numbers are larger than the single-mass diameters in the reports because the whole uterine complex is traced; on some dates (notably August 2023, patient's left side) the outline may include an adjacent bowel loop. 23.09.2026: the 248 mL is mostly a difference of method, not growth. The September outline reaches lower, to the bladder dome, and includes the anterior lesion that the June trace cut off at its lower edge; the June outline was also ragged and under-inclusive. Compared over the same levels the difference is between −4 % (above the bladder dome: 147 vs 153 mL) and +41 % (a 60 mm block aligned on the node), within the 134–228 mL spread of the earlier traces. The radiologist reports both pelvic lesions as stable.

Uterus with fibroids on the five PET-CTs
Figure 11. The uterus with its fibroids (traced as one organ, endometrioma excluded where separable) through the largest cross-section on the six PET-CTs (19 cm field). Top: CT. Bottom: CT with FDG uptake above 1.3 × liver background and the traced outline (cyan).
3D shape of the uterus on the five dates
Figure 12. 3D reconstruction of the traced uterus (body plus fibroids) on the six dates at one scale (bar = 2 cm), anterior view.
Uterus with ghost organs
Figure 12b. The same masses with ghost organs: bladder (yellow), hip bones, sacrum and femoral heads (grey), colon (sand), clipped to a box around the mass; bar = 5 cm.

Right ovarian endometrioma (haemorrhagic cyst of the right ovary; "endometrioma" per the 2023 Israeli MRI/CT revision)

A homogeneous, non-enhancing (about 45 HU), smoothly outlined mass in the projection of the right ovary / pouch of Douglas, present since the first CT of August 2022 (67 × 57 mm). It was separated from the uterus trace as the low-density component inside it (below 55–62 HU after smoothing); on the 2025 and 2026 studies the whole lower uterus is of similar density and no distinct component could be isolated, in line with the 2026 report ("ovaries not clearly differentiated").

PET-CTMax in-plane diameter, mmVolume, mLMean density, HUMax FDG uptake / liverReported by the radiologists
11 Apr 20238264451.3 × (PET not SUV-calibrated)about 6 cm (Israeli revision 19.04.2023: ~6 cm, ~50 HU, no enhancement); CT 09.02.2023: 75 × 45 mm, +45 HU
17 Aug 20238484391.5 × (PET not SUV-calibrated)CT 28.06.2023: 65 × 42 mm, +45 HU, clear even contours
14 Mar 20248044431.2 × (PET not SUV-calibrated)Israeli revision 25.03.2024: caudal formation 4.8 × 5.1 cm (from 5 × 5.5)
13 May 2025not separable from the uterus on this study: no distinct non-enhancing right-adnexal component (the whole lower uterus is of similar density)not described separately ("ovaries not clearly differentiated" in 2026)
19 Jun 2026not separable from the uterus on this study: no distinct non-enhancing right-adnexal component (the whole lower uterus is of similar density)not described separately; pelvic MRI recommended
23 Sep 2026not separable on this non-contrast study (two candidate regions inside the pelvic complex)not described separately (KMKOC)
Right ovarian endometrioma on the PET-CTs
Figure 13. Right ovarian endometrioma through its largest cross-section on the six PET-CTs (15 cm field). Top: CT. Bottom: CT with FDG uptake above 1.3 × liver background and the outline (cyan). Uptake stays at liver-background level. On the 2025–2026 studies the same region is shown with the uterus outline (violet, dashed): the cyst is isodense with the uterus and cannot be separated.
Endometrioma with ghost organs
Figure 14. 3D reconstruction of the endometrioma (teal) with ghost bladder, pelvic bones and colon; bar = 5 cm. For 2025 and 2026 the uterus (violet, translucent) is shown in its place. Its 3D shape is also in the interactive viewer above (third button).
Interactive 3D: the three pelvic/abdominal masses over time (gastric: eleven dates; uterus: six PET-CTs) — each date's traced mass is placed side by side at a common scale, with ghost organs; switch between the gastric, uterine and ovarian series. Open full screen.

What you see: one copy of the mass per scan, side by side at the same scale (orange = gastric-wall tumour, violet = uterus with fibroids, teal = right ovarian endometrioma); buttons switch between the three series. Outlines were traced slice by slice and checked by eye; 2023–2024 volumes are upper limits where neighbouring tissue had the same density.

Slice-by-slice verification montages — gastric-wall mass (eleven dates)
23 Aug 2022 (contrast CT) — every traced slice (gastric)
gastric trace aug2022
Cyan = traced outline on each slice; RAS-mm grid. Anterior up, patient left on image right.
1 Dec 2022 (contrast CT) — every traced slice (gastric)
gastric trace dec2022
Cyan = traced outline on each slice; RAS-mm grid. Anterior up, patient left on image right.
4 Jan 2023 (contrast CT) — every traced slice (gastric)
gastric trace jan2023
Cyan = traced outline on each slice; RAS-mm grid. Anterior up, patient left on image right.
9 Feb 2023 (contrast CT) — every traced slice (gastric)
gastric trace feb2023
Cyan = traced outline on each slice; RAS-mm grid. Anterior up, patient left on image right.
28 Jun 2023 (contrast CT) — every traced slice (gastric)
gastric trace jun2023
Cyan = traced outline on each slice; RAS-mm grid. Anterior up, patient left on image right.
11 Apr 2023 — every traced slice (gastric)
gastric trace apr2023
Cyan = traced outline on each slice; colour = FDG above 1.3 × liver. Anterior up, patient left on image right.
17 Aug 2023 — every traced slice (gastric)
gastric trace aug2023
Cyan = traced outline on each slice; colour = FDG above 1.3 × liver. Anterior up, patient left on image right.
14 Mar 2024 — every traced slice (gastric)
gastric trace mar2024
Cyan = traced outline on each slice; colour = FDG above 1.3 × liver. Anterior up, patient left on image right.
13 May 2025 — every traced slice (gastric)
gastric trace may2025
Cyan = traced outline on each slice; colour = FDG above 1.3 × liver. Anterior up, patient left on image right.
19 Jun 2026 — every traced slice (gastric)
gastric trace jun2026
Cyan = traced outline on each slice; colour = FDG above 1.3 × liver. Anterior up, patient left on image right.
23 Sep 2026 (non-contrast; reviewed agent segmentation) — every traced slice (gastric)
gastric trace sep2026
Cyan = outline on each slice; colour = FDG above 1.3 × liver. Anterior up, patient left on image right.
Slice-by-slice verification montages — uterus (six PET-CT dates)
11 Apr 2023 — every traced slice (uterus)
uterus trace apr2023
Cyan = traced outline on each slice; colour = FDG above 1.3 × liver. Anterior up, patient left on image right.
17 Aug 2023 — every traced slice (uterus)
uterus trace aug2023
Cyan = traced outline on each slice; colour = FDG above 1.3 × liver. Anterior up, patient left on image right.
14 Mar 2024 — every traced slice (uterus)
uterus trace mar2024
Cyan = traced outline on each slice; colour = FDG above 1.3 × liver. Anterior up, patient left on image right.
13 May 2025 — every traced slice (uterus)
uterus trace may2025
Cyan = traced outline on each slice; colour = FDG above 1.3 × liver. Anterior up, patient left on image right.
19 Jun 2026 — every traced slice (uterus)
uterus trace jun2026
Cyan = traced outline on each slice; colour = FDG above 1.3 × liver. Anterior up, patient left on image right.
23 Sep 2026 (non-contrast; reviewed agent segmentation) — every traced slice (uterus)
uterus trace sep2026
Cyan = outline on each slice; colour = FDG above 1.3 × liver. Anterior up, patient left on image right.

Femoral heads

SiteOur measurement (June 2026 CT/PET)Reports
Femoral headsNo lucent lesion found by our density criterion in either femoral head (see the bone-window montage)LISOD 08.07.2026: new 31 mm right femoral-head lucency with sclerotic rim, moderate activity, not called metastasis; Israel 08.09.2026: no bone lesions; KMKOC PET-CT 23.09.2026: no bone lesions
Femoral heads — bone window and FDG
femoral heads
Bone window through the hip joints; orange = automatic bone outline. No lucency meeting our criterion; the LISOD-reported 31 mm lucency could not be reproduced at this resolution.
Static renders of the whole-body model
anterior
Anterior view, PET-CT 23.09.2026.
oblique
Left anterior oblique view, PET-CT 23.09.2026.

Interventional-radiology opinion — Dr. Oleksandr Korshak, head of the interventional radiology department, Shalimov National Scientific Centre of Surgery and Transplantology, Kyiv (profile), 10–11.09.2026, via messenger

Thermal ablation (RFA, MWA) is contraindicated for this lesion because two contraindications coincide: proximity to the left branch of the portal vein and, most importantly, direct adjacency to the left bile duct. Y-90 radioembolisation (TARE) costs from about EUR 40,000 and is not performed in Ukraine (nor in Czechia or Slovakia) for that reason. FACT Histotripsy at HCA Healthcare UK (London) costs from £37,500 for the treatment itself, plus £500 initial review (oncologist + MDT), about £250 per clinician per visit and about £100 for the radiologist's imaging review (e-mail reply of 11.09.2026; no quote for her case issued). The family's questions about transarterial therapies (DEB-TACE, TACE, TARE) and about surgical resection remain open.

Assessment against the imaging: consistent. The lesion abuts the left portal branch and the metabolically active tumour is exactly on that side, so an ablation margin would have to include the branch and the accompanying duct.

Histotripsy (11.09.2026, Dr. Korshak). Asked about focused-ultrasound histotripsy (HistoSonics Edison system, which has just received regulatory approval in Europe with a phased roll-out to selected centres — Focused Ultrasound Foundation, 2026; the company reports about 95 % local control after re-analysis, because tumour vessels persist and were previously mis-read as residual tumour), he answered that it is a new and very expensive method (HCA price list 11.09.2026, below) with no results yet in a large number of patients with this tumour type (GIST liver metastases); "liver tumours" is too broad a category, these tumours are too heterogeneous to transfer results from one tumour type to another, and there are no long-term results for tumours of this size either. He suggested asking HistoSonics directly whether a 4 cm GIST metastasis abutting the left portal pedicle is a candidate. Our follow-up question to him — whether the target would be the small new focus rather than the old tumour that imatinib still controls — is pending.

Where histotripsy can be asked for (September 2026). HistoSonics has no European office; enquiries go through the company's physician / general enquiry forms (patients via myhistotripsy.com); its VP Global Market Access, Joshua King, joshua.king@histosonics.com. Centres treating liver tumours outside trials: Addenbrooke's, Cambridge (Dr Teik Choon See, interventional radiology; NHS and private patients; cuh.histotripsyenquiries@nhs.net, private consultations cuh.private.addenbrookes@nhs.net, subject "Private Histotripsy"; +44 1223 348920) and The Wellington Hospital, London (HCA) (self-pay, quote per case; histotripsyenquiries@hcahealthcare.co.uk, +44 20 7908 8045). FACT HCA Healthcare UK reply, 11.09.2026 (e-mail from the Patient Liaison Officer, Specialist Service Line Hub, to the family's enquiry): histotripsy is a new service at HCA UK for liver cancer (HCC, cholangiocarcinoma), metastatic liver cancer (including colorectal metastases) and neuroendocrine tumours. They ask whether liver cancer (primary or secondary) is part of the diagnosis; age over 18; breast-feeding or pregnancy; general anaesthesia (the procedure requires it; has the patient been advised she cannot have it); access to scans and clinical letters for the initial review by an oncologist / MDT; ability to travel to London (the initial consultation may be virtual). Costs stated: initial review with oncologist and MDT £500.00; treatment itself starts at £37,500.00; pre- and post-operative consultant fees approx. £250.00 per clinician per visit; likely £100.00 charge for a radiologist to review the imaging for the MDT. No quote for her case was issued (no eligibility decision). Cost is high (see prices above). On the continent the HOPE4LIVER trial sites — Klinikum Braunschweig, Universitätsklinikum Magdeburg, Humanitas Milan, Vall d'Hebron Barcelona — have the system but had not announced commercial treatment as of September 2026; the CE mark of July 2026 allows a phased roll-out "beginning with select centres of excellence". No published histotripsy series includes GIST metastases.

Guideline and evidence basis for treating the focal progression locally

Evidence review (OpenEvidence conversation, 05.09.2026, 16 questions, 91 pages — PDF)

Bottom line: imatinib-refractory, liver-limited oligoprogression with polyclonal KIT resistance; local treatment of the active nodules with imatinib continued is favoured over a plain drug switch; fresh imaging (≤ 30 days old) is required before any procedure and the 32 % ctDNA fraction argues for acting within about a month.

All genomic findings from both tests

Genetic documents (all hosted on this site; originals also on Drive): Oncomine results, 06.01.2023[11] · germline BRCA Plus panel[12] · genetic commentary, 18.01.2023[18] · Mainz molecular tumour board, 09.03.2023[35] · FoundationOne Liquid CDx report, 30.08.2026[75] (summary, full text) · raw Oncomine sequencing files: note, BAM files on Drive. Where each test came from: see Biopsies and pathology.
Full list of variants, fusions and genomic markers from the Oncomine (2022–2023) and FoundationOne (2026) reports (click to open)
TestFindingAllele fraction / levelSignificance (as stated in the report)
Oncomine Comprehensive Assay Plus, CSD Kyiv, tissue block 48278/22 (Aug 2022 liver biopsy, ~80 % tumour cells), executed 06.01.2023
report 22OM011[11] UA original · genetic commentary[18] RU original · Mainz molecular tumour board[35] DE original · raw BAM files (Drive)
KIT exon 11 deletion c.1668_1676delGTGGAAGGT (p.Gln556_Val559delinsHis = Q556_V559>H)42.5 %Driver; sensitive to KIT inhibitors (imatinib, sunitinib, regorafenib, ponatinib named)
KIF5B–MET fusion (RNA)263 reads per million — subclonalPotential MET-inhibitor sensitivity, judged unlikely to matter clinically; not a registered indication
MTAT–CDKN2B-AS1 translocation; BRD3–NUTM1 translocation—No clinical or therapeutic significance
TPMT p.Tyr240Cys; TPMT p.Ala154Thr39.8 % / 49.9 %Pharmacogenetic (thiopurine metabolism); no therapeutic significance here
PPM1D p.Gln360His—No clinical significance
Tumour mutational burdenLow, 4.82 mutations/MbLow expected benefit from PD-1/PD-L1 inhibitors
Microsatellite statusMSSLow expected benefit from immunotherapy
Loss of heterozygosityNot determined—
Hereditary panel 22B104, CSD Kyiv, 15.12.2022
report[12] UA original
Germline BRCA1, BRCA2, CHEK2, PALB2 (the four genes of the BRCA Plus panel)—No pathogenic or likely pathogenic variants in these genes
Tumour therefore judged potentially insensitive to PARP inhibitors (no HRR mutation found)
Result does not exclude variants outside the panel
FoundationOne Liquid CDx (blood, ctDNA), signed 20.08.2026, tumour type stomach GIST
full report[75] · summary · full text
ctDNA tumour fraction 32 % (high) — findings considered reliable
KIT exon 11 deletion Q556_V559>H17.0 %Original driver
KIT exon 13 V654A8.8 %Secondary resistance mutation (imatinib, avapritinib); ATP-binding pocket
KIT exon 18 A829P4.0 %Activation-loop resistance mutation; similar profile to V654A
BRCA2 T3085fs*261.5 %Germline testing recommended to distinguish somatic vs germline; relevant to PARP inhibitors, not directly to GIST
CDKN2A rearrangement (intron 2)12.8 %Tumour-suppressor loss; associated with more aggressive GIST
MTOR A1459D0.21 % (low level)Activating; possible mTOR-inhibitor sensitivity (low confidence at this level)
Blood tumour mutational burden3 mutations/Mb (low)—
Microsatellite statusMSI-high not detected—

Take-home: the exon 11 driver persists; the two secondary KIT mutations sit in different domains (exon 13 ATP-binding pocket vs exon 18 activation loop), so a single second-line drug rarely covers both — the basis of the drug-coverage table below.

Proposed systemic drugs — coverage of her three KIT clones

Merged from the FoundationOne Liquid CDx report[75] (therapy list, NCCN categories and resistance symbols, pages 1 and 9–14) and the OpenEvidence review (mutation-by-mutation activity, INTRIGUE and VOYAGER subgroup data, toxicity). Median PFS values are trial subgroup figures, not predictions for her. No single approved drug cleanly covers both resistant clones, which is why local treatment with imatinib continued and trial referral were rated the strongest strategies.

Drug / approachFoundationOne reportExon 11 Q556_V559>H (driver, 17 %)Exon 13 V654A (ATP pocket, 8.8 %)Exon 18 A829P (activation loop, 4.0 %)VEGFR / PRES-haemorrhage riskStatus and comment
Imatinib 400 mg/day (current)Listed: extensive evidence of resistance (V654A, A829P)ActiveResistantResistantNone (no VEGFR activity)Continuing. Still controls the exon-11 bulk disease; guideline advice is to keep it through any local therapy (2-year PFS after ablation 75 % with TKI vs 29 % without).
Sunitinib 50 mg, 4 weeks on / 2 offListed: extensive evidence of resistance (A829P)ActiveStrong (median PFS 15.0 mo, INTRIGUE exon 11 + 13/14)Resistant (median PFS 2.3 mo)High: grade ≥ 3 hypertension 22.6 %; PRES boxed-level warning; one intracranial-haemorrhage death in INTRIGUEPrescribed 30.07.2026 and 08.09.2026, not started; regorafenib chosen instead (dispensed 30.09.2026). Standard second line; covers only one of her two resistant clones; if used, reduced starting dose and strict home blood-pressure monitoring were advised.
Regorafenib 160 mg, days 1–21 of 28NCCN category 1 in GIST; no resistance symbolActivePreclinically weak, but clinically acceptable (median PFS 7.4 mo in ATP-pocket subgroup, VOYAGER)Active (median PFS 6.7 mo)High: grade ≥ 3 hypertension ~10–24 %; PRES in label; hepatotoxicity boxed warning; ~72 % dose modifications; hand-foot reactionNamed as an option on 08.09.2026; chosen — dispensed 30.09.2026 (Stivarga 40 mg × 84), not yet started. Best-validated third-line agent; the only approved single drug with some activity against both clones.
Ripretinib 150 mg/dayListed: limited evidence of resistance (ATP-pocket variants)ActiveReduced (median PFS 4.0 mo, exon 11 + 13/14)Strong (median PFS 14.2 mo, exon 11 + 17/18)Low: grade ≥ 3 hypertension 5.8 %; no PRES in label; weak VEGFR2Approved fourth line. In the INTRIGUE ctDNA subgroup with co-occurring ATP-pocket + activation-loop mutations (n = 22) it performed the same as sunitinib (HR 1.07). The lowest neurovascular risk of the active drugs. Price: US list price about USD 45,500 per 90 × 50 mg tablets, i.e. one month at 150 mg/day (Drugs.com price guide); European prices are negotiated nationally and not published; not registered in Ukraine (import only).
Sorafenib 400–800 mg/dayNCCN 2A "useful in certain circumstances"; no resistance symbolActiveActive in vitro (reviews conflict; ATP-pocket sometimes classed resistant)Active (class effect)Moderate: lower hypertension rate than regorafenib; no hepatotoxicity boxed warningOff-guideline-preferred; GIST evidence is retrospective (third/fourth line). Broadest in-vitro coverage of her three alterations.
AvapritinibListed: extensive evidence of resistanceActiveResistantActiveCognitive effects, intracranial bleeding warningNot suitable: did not beat regorafenib in VOYAGER and is resisted by V654A.
NilotinibNCCN 2A, other tumour type; listed as active against V654A and A829ActiveNo activity at clinical doses (2026 cell-line study)No activity at clinical dosesLow VEGFRNot recommended: negative phase III in GIST; "no biological rationale" for secondary-mutant GIST.
PonatinibNCCN 2A, other tumour typeActiveResistant (V654A is its escape mutation)ActiveArterial-occlusion and hypertension warningsPoor fit for her mutations.
DasatinibNo resistance symbolActiveNo mutation-specific dataNo mutation-specific dataLow VEGFRAbout 3-month PFS in later lines; no GIST mutation-specific efficacy data.
Velzatinib (IDRX-42) — selective KIT inhibitor, StrateGIST-1 (phase 1/1b; phase 3 StrateGIST 3 recruiting in Europe)— (not in report)Active (ORR 19 % in exon 11 primary; ctDNA VAF reduction > 99 % in 67 %)Active (exon 13 ORR 17 %; ctDNA VAF reduction > 99 % in 80 %)Active (exon 17/18 activation-loop ORR 23 %; VAF reduction in 83 %)Selective KIT inhibitor (limited VEGFR activity); hypertension not a reported class signal so farTrial only. ASCO 2026: second line median PFS 13.7 mo (ORR 40 %), third line 9.2 mo (27 %), fourth line and beyond 5.6 mo (24 %; 11.0 mo if no prior ripretinib/bezuclastinib). OS not mature. The one drug with reported activity against both of her resistance classes; eligibility and site access to be checked.
Bezuclastinib + sunitinib (Peak trial, phase 3)— (not in report)ActiveYes (sunitinib)Yes (bezuclastinib)Retains sunitinib VEGFR riskPhase 3 Peak positive (PFS 16.5 vs 9.2 months, HR 0.50; ASCO 2026); FDA decision due 30.11.2026; not yet available outside the US programme.
Pimitespib (TAS-116, Jeselhy) — oral HSP90 inhibitor, a different drug class: degrades mutant KIT as an HSP90 client protein instead of blocking the kinase; 160 mg/day, 5 days on / 2 off (CHAPTER-GIST-301, Kurokawa et al., Ann Oncol 2022)— (not in report)Active regardless of mutation (PFS HR 0.51 overall)Mutation-agnostic: exploratory PFS HR 0.52 in patients with KIT exon 13/14 or 17/18 secondary mutationsSame (exon 13/14 and 17/18 analysed together)Low: no VEGFR activity, no hypertension or vascular signal reported in 119 pooled patients (pooled safety, Int J Clin Oncol 2025); typical toxicity diarrhoea 76 %, appetite loss 35 %, creatinine rise 34 %, nausea 31 %, night blindness 12 % (grade 1)Approved in Japan only (June 2022, fourth line after imatinib, sunitinib and regorafenib); not registered in the EU, US or Ukraine. Phase 3 (n = 86): median PFS 2.8 vs 1.4 months with placebo; crossover-adjusted OS 13.8 vs 7.6 months (HR 0.42); no objective responses, benefit is disease stabilisation (disease-control rate 67 % in the Japanese expanded-access programme, Int J Clin Oncol 2025). Import via named-patient services: about €8,840 per pack of 40 × 40 mg (Everyone.org, September 2026) = 10 treatment days, i.e. roughly €17,700 per 28-day cycle. Assessment: the only approved agent whose activity does not depend on which KIT clone dominates and the lowest neurovascular risk, but the benefit is measured in weeks — a late-line or bridging option, not a substitute for local control.
Local therapy + continue imatinib (TACE / TARE / SBRT / IRE / resection)— (not in report)—Ablates resistant clones directlyAblates resistant clones directlyNo new VEGFR exposureNCCN-endorsed for limited progression; requires fresh imaging (≤ 30 days) and a tumour board; thermal ablation of the left-lobe lesion has been judged unsafe (see above), so the candidates are SBRT, IRE, DEB-TACE/TARE or resection of segments II–III.

Non-KIT findings in the report (BRCA2 T3085fs*26, CDKN2A rearrangement, MTOR A1459D; TMB 3 Muts/Mb, MSS) carry trial listings only and were judged not actionable in GIST; germline testing was recommended by the report. Germline BRCA1/2, CHEK2 and PALB2 were negative in 2022.

Full evidence summary (systemic options, local options, timing, immunotherapy)
  • Pattern: imatinib-refractory, liver-limited oligoprogression ("nodule within a mass") driven by polyclonal secondary KIT resistance; the exon-11 bulk disease still responds to imatinib. A combined local-plus-systemic strategy is favoured over simply switching TKI, and imatinib should continue throughout any local therapy (stopping the TKI collapses the benefit of ablation).
  • Systemic options: sunitinib covers V654A but not A829P; regorafenib and ripretinib cover A829P and, per VOYAGER ctDNA data, regorafenib remains clinically reasonable against V654A; sorafenib has the broadest in-vitro coverage but only retrospective GIST data. Prior PRES with intracranial haemorrhage raises the stakes for potent VEGFR inhibitors (sunitinib, regorafenib); if one is used, start at a reduced dose with tight blood-pressure monitoring. Trial referral is recommended because no approved single agent covers the full profile.
  • Liver-directed options for a viable nodule inside a cystic mass: arterially directed therapies (DEB-TACE/TACE, Y-90 TARE; NCCN 2A) treat only perfused tissue; microwave ablation (after cyst aspiration) or cryoablation for a few well-defined nodules; SBRT for a perivascular/central nodule that is unsafe for a probe; IRE is the vessel/duct-sparing alternative for a nodule abutting major vessels or central bile ducts (GIST data anecdotal); RFA is the least suited technique in fluid-containing targets.
  • Timing: ablation planning needs multiphase CT or MRI no older than about 30 days; the June scan is stale and the 32 % ctDNA fraction argues for re-imaging now and definitive local therapy within roughly a month, provided the disease is still oligoprogressive.
  • Not realistic now: mRNA neoantigen vaccines and TIL therapy (no GIST data, low TMB); checkpoint inhibitors alone give about 16 % response in TKI-refractory GIST.
  • Other: the 31 mm lucent right femoral-head lesion mentioned in the 08.07.2026 LISOD read should be characterised (MRI) because extrahepatic disease changes the value of arterial therapies; the 08.09.2026 expert reading found no bone lesions.
Hypothesis raised by a Kyiv oncologist (TARGET clinic, consultations 07.08 and 03.09.2026, messenger note 04.09.2026), not a written recommendation: a treatment break from imatinib with later rechallenge, immunotherapy (nivolumab ± ipilimumab) despite MSS/low TMB, everolimus as a possible partner, and sorafenib or regorafenib as the two main targeted options; sunitinib viewed as toxicity without benefit. Recorded here as a hypothesis for discussion; transcripts are kept private.

Surgical and local-treatment literature for the board (retrieved 14.10.2026; verified records)

Prepared for the tumour-board questions (Questions for the tumour board): evidence by topic, ongoing trials, similar published cases, the search summary and the numbered references. Every record was retrieved and checked on 14.10.2026; preprints were searched and are marked as such where cited. Not a treatment recommendation.

Literature by topic and 199 numbered references (click to open; each topic opens separately)

Literature retrieved live on 14.10.2026 (PubMed E-utilities, Europe PMC incl. preprints, ClinicalTrials.gov API, Crossref, label and guideline documents)

Method in brief: eleven topic searches plus one parallel search on GIST with malignant ascitic fluid; every record cited below was retrieved in this session (PubMed XML, Europe PMC JSON/full text, Crossref metadata, registry JSON, label pages or guideline PDF) and stored under literature_raw/; the quotes behind each number are in verification_tables.md; the per-query log with hit counts is LITERATURE_SEARCH_LOG.md. Preprints (bioRxiv/medRxiv/Research Square, Europe PMC source PPR) were searched for every topic: none relevant to this case was found, so no preprint is cited. Numbers below are abstract-level unless the full text was read (marked FT in the verification table). Nothing here is a recommendation.

Topic 1 — Limited (focal/oligo-) progression on imatinib treated locally with the TKI continued (19 queries; 40 abstracts opened)
Record Design, n Key numbers (as retrieved) Applicability to this case
Fairweather 2018 [14]; morbidity companion [44] 2 centres, 400 operations / 323 patients on TKI median PFS after surgery on imatinib: responsive 36, stable 30, unifocal progression 11, multifocal 6 months; OS not reached / 110 / 59 / 24 months; complications 27.5 %, major 17.5 % sets the expected gain by response category; whether L1 + S8 focus + wall plaques is “unifocal” or “multifocal” is itself a board question
Cho 2019 [45] propensity analysis, 90 patients with focal progression on imatinib 400 mg (38 resection + imatinib vs 52 escalation) time to imatinib failure 24.2 vs 6.5 months; OS 53.2 vs 35.1 months; IPTW HR 0.36 / 0.58 the only comparison against a systemic alternative; surgical group had lower burden
Mussi 2010 [46] 80 patients 2-year PFS 64.4 % (surgery at best response) vs 9.7 % (at focal progression); morbidity 16.3 % the patient is in the focal-progression group
DeMatteo 2007 [47]; Raut 2006 [48] 40 and 69 patients focal resistance: median progression 12 months, 2-year OS 36 %; 12-month PFS 80 / 33 / 0 % for stable / limited / generalised progression “focal” meant one growing lesion
Al-Batran 2007 [49] 38 patients, 3 centres focal vs generalised progression after salvage: median PFS 11.3 vs 2.5 months; secondary KIT mutations found only in progressing lesions (4 patients) supports resecting the progressing clone
Hasegawa 2007 [50]; Tse 2012 [51] 16 and 9 patients (resection/RFA for focal progression) median TTP 5.5 months; complete resection better (P = 0.014); liver abscess and bile leak among complications few, small lesions; gastric origin matches
Brink 2023, Dutch GIST Registry [36] 457 metastatic patients, 123 locally treated local treatment OS HR 0.56; after local treatment liver-confined disease HR 0.27, progression during systemic therapy HR 3.9 this case carries both the favourable and the unfavourable feature
Bauer 2014 (EORTC-STBSG) [16]; Du 2014 RCT [52]; Park 2014 [53] 239 metastasectomies; RCT closed at 41/210; 134 patients median OS 8.7 y (R0/R1) vs 5.3 y (R2), debulking did not prolong survival; 2-year PFS 88.4 vs 57.7 % (P = 0.089); PFS 87.7 vs 42.8 months responders, not progression
Wen 2024 [54]; Zhang 2025 [55]; Pearce 2026 [20]; Hompland 2024 [56] 238 / 73 / 96 / 12 patients 10-year OS 91.9 % with hepatectomy vs 61.1 % imatinib alone; multifocal progression HR 2.41; cytoreduction + systemic OS 10.8 vs 7.4 years; 42 % progression-free 3 years after stopping imatinib in oligometastatic CR mixed indications; selection bias
Synthesis. No prospective study addresses local therapy for focal progression on imatinib. Retrospective series agree on a gradient: surgery during focal progression yields a median post-operative PFS of about 8–12 months and OS around 5 years, better than multifocal progression (PFS 3–6 months) and worse than responding disease; the single comparison with a systemic alternative favoured resection plus continued imatinib. Complete resection, liver-confined disease and low mitotic index are repeatedly prognostic. Gaps: no series stratifies by PET-defined progression, ctDNA-defined clones, lesion volumes of 50–80 mL next to a 1.2 L necrotic mass, portal-pedicle contact, equivocal peritoneal cytology or prior PRES; none reports two-stage hepatectomy in this setting. No 2024–2026 congress abstract or preprint was found.
Topic 2 — The large fluid/necrotic mass: drainage, sclerosis, rupture, infection, “nodule within a mass” (28 queries; 45 abstracts opened; negative finding on drainage)
Record Design, n Key numbers Applicability
Shankar 2005 [17] imaging review, 92 trial patients new nodule within a mass in 21 of 39 recurrences; first sign of progression in 17 of 21 the imaging pattern of this case; no management data
Choi 2007 [15] 172 lesions / 40 patients density/size criteria: sensitivity 97 % vs RECIST 52 % for PET response why size-stable cystic masses count as response and new nodules as progression
Tirotta 2019 [4] 470 TKI-treated patients complicated tumour response (bleeding, abscess, perforation) in 6.4 %; percutaneous drainage in 4 of 30; mortality 13.3 %; median onset 14 months only series quantifying spontaneous complications of responding disease
Colović 2013 [57]; Suzuki 2008 [58]; Radkani 2008 [59] single cases, 14–20.5 cm cystic metastases operative excision or partial excision then imatinib; PVE + lobectomy with post-operative subhepatic abscess litre-scale analogues, all imatinib-naive, none drained percutaneously
Akbulut 2018 [60] single case, giant cystic ileal GIST repeated percutaneous drainage (≥ 10 L, then 6 L) → re-accumulation, infection, resection the only published drainage course of a cystic GIST
Jang 2018 [61]; Denton 2026 [62]; Yu 2024 [63]; Pierce 2018 [64] case reports / 28-patient embolisation series rupture of hepatic GIST metastases spontaneously, after Y-90 and during a TACE course; arterial embolisation the usual rescue; ruptured GIST median OS 611 days subcapsular lesions and interventions carry rupture risk
Abscess after TACE/ablation: Wang 2025 [65]; Song 2001 [66]; Ye 2022 [67]; Wang 2024 [68] meta-analysis 254,408 TACE; 2,439 patients; 137 DEB-TACE for metastases; 314 DEB-TACE pooled abscess 0.54 % (mortality 7.7 %); metastatic tumours 2.6 %; 8.8 % per patient in metastatic DEB-TACE; 3.8 % with large size as a risk factor biliary intervention, the dominant risk factor, is absent here; metastatic histology and large size apply
Synthesis. The literature supports the reading that FDG-avid plaques in a size-stable treated cyst are the “nodule within a mass” progression pattern, but no publication describes percutaneous drainage, aspiration or sclerosis of a cystic GIST liver metastasis (verified negative across 8 targeted queries); the only drainage experience (a primary cystic GIST) ended in re-accumulation and infection, and the litre-scale liver analogues were managed by operative excision in imatinib-naive patients. Spontaneous bleeding, abscess or perforation occurred in 6.4 % of responding GIST on TKI; rupture of hepatic metastases is documented spontaneously and after biopsy, TACE and Y-90. Gaps: decompression of a 1.2 L treated cyst, haemorrhage risk under continued or switched TKI, and resecting a resistant cyst wall with a major hepatectomy alongside two other progressing sites.
Topic 3 — Sequencing, staged hepatectomy, ALPPS/PVE, major hepatectomy for GIST metastases (25 queries; negative finding on lesion order)
Record Design, n Key numbers Applicability
Kraft 2023 [69] single case, bilobar giant GIST metastases, TKI-refractory two-stage debulking: left side first, right posterior sectionectomy seven weeks later; grade A liver insufficiency after stage 1; survival 55 months from diagnosis the only published two-stage bilobar GIST hepatectomy; left-first order unexplained; no PVE, no R status
Liu 2017 [70] single case, right-sided bulky necrotic metastases on imatinib FLR 326 mL (34 %) → 50 % in 10 days after PVE plus microwave partition; right trisegmentectomy remnant tumour-free, unlike L1 here
Lai 2021 [71] systematic review of uncommon ALPPS indications, 136 cases 6 GIST cases (4.4 %); Clavien–Dindo ≥ IIIa in 2 of 3 evaluable ALPPS in GIST is anecdotal
Bowers 2012 [72]; Schadde 2014 [73]; Adam 2006 [74] two-stage hepatectomy (39, GIST n = 1); ALPPS registry (202); 1,452 non-colorectal resections morbidity 23 % and 56 % per stage, liver insufficiency 5 % and 22 %; ALPPS 90-day mortality 9 %, non-colorectal OR 2.7 for severe complications; R0 83 %, 60-day mortality 2.3 % staged-surgery risk benchmarks from other tumours
Sutton 2022 [75]; Seesing 2016 [76]; Xue 2022 [77]; Shi 2017 [78]; Turley 2012 [79] 91 / 48 / 119 / 144 / 39 patients resection of treatment-resistant lesions: 10-year OS 58 % vs 72 % curative-intent vs 41 % unresected; major hepatectomy 25–39 %; R0 71–72 %; severe complications 10 %, mortality 2.5 %; extrahepatic disease HR 9.51 responders with 4–5 cm lesions; no staged procedures
Zeng 2024 [80]; Chen 2019 [81]; Rahimi-Ardabily 2023 [21] RFA vs hepatectomy cohorts; meta-analysis 988 patients PFS 14.3 vs 42.7 months and 9 vs 29 months favouring resection; complications 10 % vs 53 % favouring RFA; resection + TKI OS HR 2.10 modality trade-off in GIST liver metastases
Fan 2025 [82] single case resection of a 14 cm lesion carrying secondary KIT exon 13 V654A at limited progression on imatinib; no recurrence at 39 months the only published resection of a V654A-bearing progressing lesion
Synthesis. No study addresses which lesion to remove first in bilobar GIST metastases, and none describes draining a necrotic mass before treating a contralateral viable lesion. Staged hepatectomy in GIST rests on single cases and six pooled ALPPS cases; benchmarks from colorectal two-stage hepatectomy and the ALPPS registry show second-stage morbidity above 50 % and higher risk for non-colorectal indications. Resection series on imatinib report major hepatectomy in a quarter to a third, R0 about 71 %, severe morbidity 10–18 % and mortality up to 2.5 %, with better outcomes on responsive disease. No human data exist on imatinib and remnant hypertrophy.
Topic 4 — Peritoneal disease and ascitic cytology: AUS, cell block, GIST cells in fluid, surgery with peritoneal disease (25 topic queries + 47 queries of the parallel ascites search)
Record Design, n Key numbers Applicability
Jamal 2024 [2]; Castilho da Silva 2024 [83]; Ahuja 2024 [84] meta-analyses of the International System (TIS) pooled risk of malignancy: AUS 49 % (95 % CI 37–61 %), malignant 100 %; AUS 50.8 %; specificity of “malignant” 99 %, of “atypical and above” 95 % carcinoma-dominated data; the two readings here imply very different pretest risks
Doğan 2025 [27]; Wang 2023 [85] 3,501 effusions; review AUS ROM 27 %; inter-observer kappa for AUS 0.162; AUS is “a diagnosis of exclusion” needing clinical correlation; peritoneal-fluid AUS ROM about 22–63 % disagreement between laboratories on an atypical fluid is documented and common
Yarikkaya 2025 [28]; Fatima 2011 [86] 37 AUS fluids; 98 FNA cell blocks cell-block immunopanel re-classified 86.1 % of AUS; DOG1 sensitivity 100 %, c-kit 70 % the resolving test for GIST is a cell block with DOG1/CD117, not the usual epithelial panel
Sultan 2025 [3]; Tajima 2016 [30]; Wong 2002 [87]; Valdivia-Mazeira 2022 [88] case reports (the entire direct evidence) GIST cells in ascites/effusions were large, epithelioid or pleomorphic, mimicking adenocarcinoma; sparse in smears; diagnosis rescued by DOG1/CD117 on cell block the cells described on review here were small and monomorphic
Shidham 2021 [29]; Chen 2019 [89]; Wieczorek 2001 [90] reviews / series false positives up to 0.5 %, false negatives up to 30 %; low-grade sarcomas rarely exfoliate; GIST aspirates pleomorphic in 7 % a Ki-67 2 % GIST has a low tendency to shed cells; not GIST-specific evidence
Kim 2015 [26] 403 imatinib-treated GIST fluid retention in 15; ascites in 80 % of these; intermittent mild retention at any time a benign explanation for small-volume ascites on long-term imatinib
Nishida 2019 [35]; Hølmebakk 2018/2019 [39,91] rupture definition; Oslo cohorts rupture criteria do not include positive cytology; incisional biopsy counts as rupture, needle biopsy does not; gastric GIST 5-year RFS 37 % after rupture; peritoneal penetration without rupture not prognostic framework from localised disease; laparoscopic incisional biopsy of GF meets the definition
Li 2024 [19]; de la Fuente 2013 [92]; Pearce 2026 [20]; Rahimi-Ardabily 2023 [21] 194 / 59 / 96 / 988 patients peritoneum-only vs liver-only OS HR 2.67; liver-only vs liver + sarcomatosis OS 40.5 vs 28.7 months (NS); no OS difference by site in oligometastatic disease; hepatectomy benefit retained in studies with concurrent peritoneal disease peritoneal disease worsens prognosis but did not abolish the association of liver surgery with survival
Gutiérrez 2026 [31]; Spiliotis 2026 [32]; Bryan 2014 [93]; López-Rojo 2026 [94] peritoneal GIST surgery series 5-year OS 77.8 %; median OS 62 months, better with PCI ≤ 10; TKI + cytoreduction 7.9 years vs 1.04 without TKI; progressing on TKI before surgery 1.35 years macroscopic peritoneal disease; cytology never a variable
Hariharan 2012 [95] meta-analysis, colorectal liver metastases staging laparoscopy yield 19 %, sensitivity 75 % for peritoneal lesions no GIST-specific data on staging laparoscopy
Synthesis. Direct evidence on GIST cells in ascitic fluid consists of five or six case reports; no series gives a base rate of positive cytology in metastatic GIST, and no study uses ascitic cytology as a selection criterion for hepatectomy. Under the International System an AUS call carries a pooled risk of malignancy near 50 % with poor reproducibility; the published route to resolving it is a cell block with an immunopanel, which for GIST must include DOG1/CD117. Peritoneal disease is associated with worse survival than liver-only disease, yet the association between liver resection and survival persisted in pooled data including concurrent peritoneal disease, and peritoneal GIST surgery series show that outcome tracks TKI sensitivity and completeness. Gaps: frequency and prognostic weight of positive cytology in imatinib-responsive GIST; whether cystic peritoneal nodes shed viable cells; staging-laparoscopy yield in GIST.
Topic 5 — Ablation next to the portal pedicle and bile ducts: IRE, MWA/RFA, histotripsy; GIST ablation series (37 queries; 72 abstracts; 3 full texts; histotripsy regulatory documents)
Record Design, n Key numbers Applicability
Silk 2014 [5] IRE within 1 cm of major hepatic ducts, 11 patients / 22 metastases (1.0–4.7 cm) transient liver-test rise after 4 sessions; 1 stent; prolonged abnormalities attributed to progression closest anatomical match; no efficacy data; not GIST
Thamtorawat 2022 [6] IRE 13 vs RFA 31 peribiliary tumours (~1.8 cm) significant biliary complications 7.7 % vs 16.1 %; local progression 23 % vs 44 % at 3 years (NS) direct IRE-vs-thermal comparison at the duct; lesions far smaller than 5 cm
Dollinger 2016 [96]; Distelmaier 2017 [97]; Tamura 2020 [98] 55 ducts within 1 cm of IRE zones; 43 tumours against major veins; vessel occlusion study radiological duct changes common but ducts “largely unaffected”; complete ablation 93 %, cholestasis in 24 % of portal-adjacent cases, tract recurrence 26 %; vessels ≥ 4 mm rarely occlude a 5 cm zone would encase segmental branches
COLDFIRE-2 [99]; IRE pooled data [100,101,102] prospective CRLM ≤ 5 cm (n = 50); 807 / 776 / 180 patients 1-year local-progression-free 68 %, adverse events 40 %, 1 death; complete ablation 86 %, complications 23 % (major 6.9 %); biliary stricture 2.8 % the only prospective IRE data admitting 5 cm lesions; colorectal
van Tilborg 2016 [103]; Felker 2015 [104]; Ohnishi 2008 [105] MWA vs RFA peribiliary CRLM (199 lesions); biliary cooling series biliary complications “especially common” after peribiliary MWA (P = 0.002); cooling reduced biliary injury from 31 % to 0 % and from 46 % to 2.5 % thermal ablation at a first-order duct is not an absolute contraindication in cooled, small lesions
GIST RFA series: Jung 2015 [106]; Hakimé 2014 [107]; Yamanaka 2013 [108]; Yoon 2018 [109]; Liu 2024 [110]; Yang 2020 [111] 29 / 17 / 7 / 24 / 34 / 55 patients technical effectiveness 95.6 % at mean 1.3 cm (1 tract seeding); 2-year PFS 75 % with TKI maintained vs 29 % discontinued; local progression 4.8 %; biliary stricture and abscess among major complications; ablation vs resection OS 102 vs 117 months, complications 18.5 % vs 78.6 % same clinical setting; lesions a quarter of L1’s size, no duct contact; peri-organ lesions left untreated
Histotripsy: #HOPE4LIVER [8,42]; multicentre data [112,113,114]; near-vessel data [43]; sarcoma case [115]; regulatory [116,117]; trials [118,119,120] pivotal 44 patients / 49 tumours ≤ 3 cm; 230–972 patients; 21 tumours abutting major veins; 1 liposarcoma case technical success 95 %; 1-year local control 63.4 % (90 % post hoc); major complications 1.3–7 %; 30-day mortality 11.1 % in a US practice cohort; bland portal vein thrombosis 38 % when zones abut large veins; CE Mark 13 July 2026 with no labelled size limit; FDA order states the device “has not been evaluated for the treatment of any specific disease” no GIST treated; hilar structures excluded from pivotal treatment volumes; no European liver histotripsy trial recruiting
Synthesis. No published series matches histology, size and location together. IRE has been applied to tumours within 1 cm of first-order ducts and against major veins with clinically significant biliary complications in the single-digit range but radiological duct changes in a quarter to a half, and pooled complete-ablation rates near 86 % that fall above 3 cm. Thermal ablation at a first-order duct carries documented biliary risk, especially for MWA, which intraductal cooling mitigates in small lesions; GIST-specific RFA series show high local control at 1.3–2.5 cm with imatinib continued, and shorter PFS than resection in comparative cohorts. Histotripsy is CE-marked since July 2026 without a labelled size limit, but its evidence is confined to ≤ 3 cm tumours with hilar structures excluded, and no GIST metastasis has been treated in the literature. Gaps: any ablation data for a 5 cm lesion at the left portal pedicle; IRE or histotripsy outcomes in GIST; long-term biliary follow-up.
Topic 6 — TARE/SIRT, TACE, DEB-TACE and bland embolisation in GIST (21 queries; 5 full texts)
Record Design, n Key numbers Applicability
Hohenberger 2025 [24]; Rathmann 2015 [121]; conference abstract [122] SIRT, 26 TKI-resistant patients (median 3 prior lines); precursor 9–11 Choi response 16/26; median hepatic PFS 16 months, OS 28 months; KIT exon 11 with secondary mutations: hepatic PFS 7 months; 3 gastric ulcers needing surgery; 2 excluded for lung shunt > 20 % TKI-exhausted population; the index genotype had the shortest hepatic PFS; no lesion-size data
Berman 2026 [123] SIRT, 12 SDH-deficient GIST ORR 66.7 %, DCR 100 % different biology
Liu 2026 [25]; Cao 2012 [124]; Cao 2014 [125] DEB-TACE 34 vs 43 (≥ 2 TKI lines); cTACE 22 vs 38; bland vs cTACE 45 ORR 94 %, liver PFS 11.0 vs 5.0 months, OS 18 vs 12 months; liver PR 54.5 %, OS 68.5 vs 25.7 weeks; PFS 56.6 vs 42.1 weeks all after TKI failure; lesions selected or described as hypervascular; cystic lesions showed only faint ring staining
Kobayashi 2006/2009 [126,127]; Takaki 2014 [128]; Maluccio 2006 [129] 110 HACE; 14 imatinib-resistant; 11 bland HAE; 24 sarcoma (16 GIST) PR 14 %, liver PFS 8.2 months, OS 17.2 months; imatinib-resistant liver PFS 7.0 months; bland HAE PFS 3.9 months, no major complications; response 60 % largely pre-imatinib or late-line
Kamat 2008 [130]; Miller 2018 [131]; Pierce 2018 [64] 60 patients with > 75 % liver involvement; 39 hepatic sarcoma Y-90; 28 sarcoma embolisations major complications 19 %, 12 procedure-related deaths with massive burden; Y-90 response 36 %, OS 30 months; ruptured GIST OS 611 days the only series addressing very large tumour burden warns against embolisation with massive burden plus risk factors
Malavia 2026 [132]; Yerubandi 2016 [133]; Denton 2026 [62]; Wang 2024 [68] hypovascular Y-90 (27); shunt predictors (190); rupture case; abscess 314 hypovascular tumours still showed tumour-to-normal uptake ratios > 1 (necrotic tumours excluded); shunt > 10 % predicted by tumour diameter; rupture one day after SIRT; abscess 3.8 % with large size as risk factor addresses the “dark on CT” objection only indirectly
Synthesis. Transarterial evidence in GIST is retrospective and almost entirely from TKI-exhausted patients: SIRT gave median hepatic PFS 16 months overall but 7 months in KIT exon 11 tumours with secondary mutations; TACE and DEB-TACE series report liver PFS of about 11 months with survival advantages over supportive care in non-randomised comparisons; bland embolisation stabilises for 3–8 months. No series treated a necrotic mass near 1 L; lesion size, necrosis and lung-shunt behaviour for such a mass are undocumented; rupture after SIRT and abscess after DEB-TACE are reported; TARE is not available in Ukraine.
Topic 7 — Imatinib around surgery; regorafenib/sunitinib/ripretinib holds; VEGFR TKIs after PRES (33 queries; labels and guideline texts read)
Record Design, n Key statements and numbers Applicability
ESMO–EURACAN–GENTURIS 2022 [11]; GEIS 2023 [38] guidelines (full text read) surgery or ablation of focal progression (“nodule within a mass”) with imatinib continued [IV, C]; imatinib “can be safely stopped a few days or even 1 day before surgery, to be resumed promptly”; GEIS: stop 24 h before, restart once oral tolerance is confirmed; interruption “generally followed by relatively rapid tumour progression” [I, A] direct answers to Q6 on imatinib timing
BFR14: Blay 2007 [134]; Le Cesne 2010 [13]; Patrikidou 2013 [135]; Blay 2024 [136] randomised interruption after 1, 3 and 5 years 2-year PFS 80 % vs 16 % after 3-year interruption; median PFS 6.1 vs 27.8, 7.0 vs 67.0, 12.0 months vs not reached; only 42 % of CR patients regained CR on rechallenge; interruption “not recommended” planned months-long stops, not peri-operative pauses
Metastasectomy on TKI: Fairweather 2018 [44]; Raut 2006 [48]; Mussi 2010 [46]; Hasegawa 2007 [50]; Raut 2010 (sunitinib) [137]; Lee 2019 [10]; Rajkumar 2006 [138] 400 operations; 69; 80; 16; 50 on sunitinib; 613 (108 pre-operative TKI); mouse model complications 27.5 %, major 17.5 %; morbidity 16.3 %; no hospital deaths; surgery on sunitinib: complications 54 %, reoperation 16 %; pre-operative TKI: complications 34 % vs 10 %, anastomotic leak 18 % vs 6 %; imatinib delayed wound healing in mice at 7 days, closed by 14 no series states the day imatinib was stopped; the imatinib label has no hold statement
Labels: regorafenib [12,139]; sunitinib [140,141]; ripretinib [142,143] current US and EU product information regorafenib: withhold ≥ 2 weeks before elective surgery, ≥ 2 weeks after major surgery until healing; RPLS → discontinue; BP must be controlled before starting; sunitinib: ≥ 3 weeks before, ≥ 2 weeks after; RPLS → discontinue (US) / temporary suspension (EU); ripretinib: ≥ 1 week before (US) or 5 days before and after major surgery (EU); no PRES statement the holds define the earliest regorafenib start relative to each operation
PRES rechallenge: Tlemsani 2016 [144]; Miller-Patterson 2017 [145]; Lee 2026 [146]; Imai 2022 [147]; Catalano 2022 [148]; Deguchi 2018 [149]; Li 2026 [150] 34 neurovascular events; case reports; FAERS severe vascular toxicity recurred in 2 of 6 reintroductions; pazopanib PRES with occipital haemorrhage: no anti-VEGF drug restarted; pazopanib four weeks after a sunitinib-related cerebellar bleed: fatal re-bleed; lenvatinib after sorafenib RPLS: no recurrence over 5 years; PRES recurred on sunitinib reintroduction; pazopanib restarted at half dose under BP control without recurrence; PRES signal for 13 of 16 VEGF-pathway agents no report of any VEGFR TKI after PRES with intracerebral haemorrhage; none of regorafenib or ripretinib after PRES
Blood pressure: Maitland 2010 [151]; ESC 2022 [152]; RT + VEGFR TKI toxicity: Brade 2016 [153]; RT with TKI continued: Joensuu 2015 [7]; SBRT case [154] consensus; guideline; phase I; phase II; case goal < 140/90 mmHg (< 130/80 with diabetes); home monitoring daily in the first cycle; hold at ≥ 180/110; sorafenib with SBRT “not recommended outside a clinical trial”; conventional RT with TKI unchanged well tolerated; SBRT 42 Gy/6 fractions with sunitinib continued frames Q7; no post-PRES-specific target exists
Synthesis. Guidelines support continuing imatinib with local treatment of focal progression and allow a pause of a day or a few days around surgery; all interruption data concern months-long stops and show rapid progression. Metastasectomy on TKI carries 16–28 % morbidity (major 17.5 %); pre-operative TKI exposure was associated with more complications and anastomotic leaks in one series. The candidate second-line drugs require pre-operative holds of 2 weeks (regorafenib), 3 weeks (sunitinib) or 1 week/5 days (ripretinib) and at least 2 weeks after major surgery; regorafenib and sunitinib carry RPLS warnings, ripretinib none. There is no published experience of any VEGFR TKI after PRES with intracerebral haemorrhage; the one report of a second TKI after a TKI-associated brain haemorrhage ended fatally, the one after non-haemorrhagic RPLS ran five years without recurrence. Generic VEGF-inhibitor advice is blood-pressure control before starting and a goal below 140/90 (130/80 with diabetes).
Topic 8 — KIT exon 13 V654A and exon 18 A829P, inter-lesion heterogeneity, clone-targeted local therapy (23 queries; 31 abstracts; 3 full texts)
Record Design, n Key numbers Applicability
Heinrich 2024, INTRIGUE ctDNA [1] randomised second-line trial, ctDNA in 362 exon 11 + 13/14: sunitinib PFS 15.0 vs ripretinib 4.0 months; exon 11 + 17/18: ripretinib 14.2 vs 1.5 months; co-occurring pocket + loop mutations (n = 22): HR 1.07, no difference; V654A the commonest secondary mutation the index profile is the subgroup without a preferred drug
Serrano 2023, VOYAGER ctDNA [155] 386 ctDNA samples ATP-pocket mutations: avapritinib PFS 1.9 vs regorafenib 5.6 months; regorafenib unaffected; 23.4 % carried both pocket and loop mutations argues against avapritinib; regorafenib indifferent to a pocket clone
Serrano 2019 [22] cell lines and xenograft V654A: sunitinib 45 nM vs regorafenib 2000 nM; A829P: no agent below the authors’ 500 nM threshold (regorafenib 2500 nM); ripretinib and avapritinib not tested the only comparative sensitivity data for both mutations; no clinical A829P series
Liegl 2008 [33]; Wardelmann 2006 [156]; Li 2025 [40]; Mühlenberg 2024 [157] 53 metastases / 14 patients; 104 samples / 32; 206 samples / 56; 25 ripretinib-refractory 67 % had different secondary mutations in different metastases; 43.8 % acquired new mutations; a secondary mutation was present in only 57.5 % of samples from mutation-positive patients, and in 95 % vs 32 % depending on continued imatinib; pocket + loop mutations often in cis two plasma mutations do not say whether L1 carries one, both or neither
Desai 2007 [158]; Al-Batran 2007 [49]; Cho 2019 [45]; Ono 2019 [159]; Fan 2025 [82] imaging series; 38; 90; cases resistant nodule precedes overall progression by 5 months and carried a new mutation in 8 of 10 biopsies; secondary mutations only in progressing lesions; resection at focal progression TTF 24.2 vs 6.5 months; resected focal nodule carried exon 18; resected V654A lesion without recurrence at 39 months rationale and case-level precedent for removing the resistant clone
Johansson 2021 [41]; Hashimoto 2024 [160]; Heinrich 2008 [161] 161 plasma samples / 32; 133; 97 on sunitinib ctDNA cleared after surgery in all positives; ctDNA-matched TKI PFS 8.23 vs 2.43 months; exon 13/14 better than 17/18 on sunitinib ctDNA is a plausible monitoring tool after local therapy; no validated endpoint
Synthesis. V654A is relatively sunitinib-sensitive and avapritinib-resistant; A829P has no clinical comparative data and no in-vitro agent below the activity threshold; in INTRIGUE the co-occurring subgroup showed no advantage for either sunitinib or ripretinib. Different metastases commonly carry different resistant clones, so the plasma result cannot be assigned to L1, the dome focus or the wall plaques without tissue. The focal resistant nodule is a recognised entity that almost always harbours a new mutation, and resection at focal progression with imatinib continued is associated with longer time to failure in retrospective data. No publication sequenced a resected progressing lesion against concurrently stable lesions, and none reports ctDNA before and after local therapy of a resistant clone.
Topic 9 — The gastric primary after TKI: pathological response, calcification, resection of the primary, combined procedures (32 queries)
Record Design, n Key numbers Applicability
Bauer 2005 [9]; Rutkowski 2006 [162]; Scaife 2003 [163]; Agaram 2007 [18]; Vassos 2021 [164]; Goh 2006 [165] resected responders (11, 24, 17 specimens); 43 nodules; 50 neoadjuvant gastric; review viable cells in all but one, 21 of 24 and 15 of 17 specimens; histological response heterogeneous and unrelated to duration; pCR 24 % after neoadjuvant imatinib; pathological response does not correlate with PET one hyalinised 1.5 cm fragment cannot exclude viable foci in a 4 cm lesion
Hedenström 2017 [166]; Kondo 2018 [167]; Cameron 2010 [168] biopsy vs specimen Ki-67; 6-year pCR case; mirror-image case Ki-67 2.5 % on EUS vs 0.2 % on specimen; whole-specimen pCR after 6 years; primary regressed while liver metastases progressed with secondary mutations no report of a calcified FDG-negative primary regrowing on continued imatinib
Warakaulle 2006 [169]; Werewka-Maczuga 2017 [170]; Eslamy 2008 [171] imaging series / case calcification occurs in responding lesions and increases on imatinib; one case of calcification increasing together with FDG activity calcification is a response feature, not proof of cell kill
Zhao 2020 [172]; Gaitanidis 2019 [173]; Sato 2016 [174]; An 2013 [37] SEER 455; propensity 570; registry 14; 249 primary-site surgery OS 72 vs 40 months (HR 0.58), gastric subgroup HR 2.95 for no surgery; upfront primary surgery or cytoreduction before imatinib without benefit registry data lack response and timing; no study resects a quiescent primary while metastases remain viable
Lee 2019 [10]; Fairweather 2018 [44] 613 (108 pre-operative TKI); 400 metastasectomies complications 34 % vs 10 %, anastomotic leak 18 % vs 6 % with pre-operative TKI; major complications 17.5 %, rising with complexity supports the surgeon’s reluctance to combine a gastric wedge with a major hepatectomy
ESMO 2022 [11] guideline surgery “not recommended as a primary approach in the metastatic setting”; residual-disease surgery “should be individualised” [III, C] —
Synthesis. Every whole-specimen series of imatinib responders found viable cells in most resected lesions and histological response is heterogeneous within and between nodules, so a single hyalinised fragment is expected in a responding area and does not exclude viable tumour elsewhere. Calcification marks response but has not been linked to viable-cell content. Resection of the primary in metastatic GIST shows survival associations only in registry data without response or timing; institutional series tie benefit to complete resection of all disease in responders. No study addresses removing a stable, FDG-cold primary while a metastasis remains viable, and no GIST paper reports gastric wedge resection combined with major hepatectomy.
Topic 10 — Tumour spillage and seeding after puncture, biopsy or drainage of GIST (33 queries; ESMO text read; negative finding on drainage)
Record Design, n Key numbers Applicability
Jakob 2022 [175]; van Houdt 2021 [176]; Eriksson 2016 [177] systematic review 350 patients; cohort 228; trial subset 47 biopsied one needle-tract seeding after percutaneous core biopsy; 1 of 70 transcutaneous biopsies (1.4 %); route not significant in multivariable analysis; no excess recurrence after biopsy under adjuvant imatinib primary tumours before surgery; no liver-metastasis or cystic-lesion data
ESMO 2022 [11]; Nishida 2019 [35]; Hølmebakk 2016/2018 [39,178]; Joensuu 2024 [179] guideline; definitions; cohorts peritoneal contamination from a properly performed core biopsy “negligible”; cystic masses to be biopsied only at specialised centres; incisional biopsy counts as rupture, uncomplicated needle biopsy does not; 5-year RFS 37 % after rupture; 10-year RFS 21 % vs 55 % rupture framework from non-metastatic disease
Davies 2008 [180]; Shoup 2002 [181] case; 1,650 laparoscopies port-site metastasis about 22 months after diagnostic laparoscopy with biopsy of peritoneal seedlings in gastric GIST on imatinib; port-site implantation 0.79 % after diagnostic laparoscopy for upper-GI malignancy the closest analogue to the 05.10.2026 laparoscopy
Minoda 2023 [182]; Gao 2020 [183]; Terasawa 2023 [184]; Silva 2008 [185]; Berger-Richardson 2017 [186]; Iemoto 1981 [187] EUS sampling; reviews; pancreatic EUS seeding; HCC meta-analysis; retroperitoneal sarcoma; case tumour cells in gastric juice after incisional biopsy 64 % vs 0 % after EUS-FNA; no GIST EUS seeding case; cystic/necrotic components raised seeding to 3.7 % vs 0 %; HCC tract seeding 2.7 %; sarcoma 0.37 %; carcinomatosis after cyst aspiration context from other histologies; no report of seeding after aspiration or drainage of a cystic GIST metastasis
Synthesis. Needle biopsy of GIST carries a low, quantified seeding risk (about 1 in 70 percutaneous biopsies in one cohort; “negligible” per ESMO when properly performed); no publication reports seeding after EUS-FNA of a GIST, after biopsy of a GIST liver metastasis, or after aspiration/drainage of a cystic GIST metastasis. Laparoscopic incisional biopsy is classified as rupture in the localised-disease framework, and a port-site metastasis after diagnostic laparoscopy in disseminated gastric GIST is on record. Other histologies show higher seeding when cystic or necrotic components are punctured.
Ongoing trials relevant to this case (ClinicalTrials.gov API records opened 14.10.2026; eligibility must be confirmed by the sites)
Trial Status (14.10.2026) Design Sites of interest Eligibility notes relevant here
StrateGIST 3, NCT07218926 [23] recruiting phase 3, velzatinib (IDRX-42) vs sunitinib after imatinib Hungary (Budapest, Pécs), Germany (Berlin, Essen, Mannheim, Munich, Cologne, Dresden, Tübingen), UK; Poland (Kielce, Poznań, Warsaw) listed as recruiting in the registry record of 05.10.2026, but a parallel CTIS check (lit_trials_centres) reports Polish recruitment ended 12.10.2026 — confirm with the sponsor progression on or intolerance to first-line imatinib; tissue KIT/PDGFRA result; no posted haemorrhage/PRES exclusion; PET-only progression and planned liver surgery need sponsor adjudication
Inlexisertib + ripretinib, NCT05957367 [188] recruiting phase 1/2, second line after imatinib Frankfurt, Hamburg measurable disease; uncontrolled hypertension excluded
Velzatinib expanded access, NCT07825701 [189] available individual patient access after ≥ 3 lines GSK portal ascites counts as unstable liver disease
Peak, NCT05208047 [190]; INSIGHT, NCT05734105 [191] European sites closed / active not recruiting bezuclastinib + sunitinib; ripretinib vs sunitinib Poland, Czechia, Germany, UK (closed) INSIGHT excludes ctDNA exon 13 (her V654A)
PATHFINDERS, NCT07109024 [192] not yet recruiting PET-guided lesion-level resistance profiling Essen, Lübeck fourth line only
OligoRARE, NCT04498767 [193] recruiting (record 2024) SBRT for rare oligometastatic cancers (sarcoma listed) Warsaw, Gdańsk, Hamburg, UK no carcinomatosis or effusion; lesions ≤ 6 cm — likely excludes R1
Histotripsy: #HOPE4LIVER EU/UK NCT04573881 [118], US NCT04572633 [119], BOOMBOX NCT06486454 [120] closed / closed / US registry recruiting device trials and registry Germany, UK, Italy, Spain (closed); US ≤ 3 tumours of ≤ 3 cm; portal vein/bile ducts excluded from the treatment volume; no European liver histotripsy trial recruiting
VALOROUS, NCT06103669 [194]; RT + ripretinib, NCT06507683 [195]; NB003, NCT07379047 [196]; ctDNA-guided sunitinib/regorafenib, NCT05366816 [197]; NN3201 ADC, NCT06805825 [198]; ATEZOGIST, NCT05152472 [199] recruiting (US / China / China–Korea / US / US / France) local ablation or SABR of oligoprogressive lesions with systemic therapy continued; radiotherapy + ripretinib (fourth line); NB003 after imatinib (intracranial haemorrhage within 1 year excluded); exon 13 → sunitinib, exon 17 → regorafenib; KIT ADC; imatinib ± atezolizumab (fourth line) outside reachable geography or later lines
No prospective trial of surgery, ablation, SBRT or embolisation with TKI continuation for oligoprogressive GIST is open in Europe, the UK, Israel or Türkiye; local treatment here would be outside a trial. No trial explicitly admits patients with prior PRES or intracranial haemorrhage.
Most similar published cases and series (all topics)
Citation Similarity What matches What differs
Cho 2019 [45] high focal progression on imatinib 400 mg; resection with imatinib continued vs escalation not liver-specific; no genotype
Fairweather 2018, unifocal-progression group [14] high surgery during unifocal progression on imatinib: PFS 11, OS 59 months multi-organ; 2001–2014
Heinrich 2024, co-occurring subgroup [1] high ctDNA with pocket + loop mutations on exon 11 background (n = 22): no preferred drug drug comparison, not local therapy
Kraft 2023 [69] medium bilobar giant GIST metastases, two-stage resection, left side first, 7-week interval TKI-refractory man, debulking, no PVE
Liu 2017 [70] medium right-sided bulky necrotic metastases on imatinib; PVE + partition; remnant 34 → 50 % remnant tumour-free
Fan 2025 [82] medium resection of a V654A-bearing progressing lesion at limited progression solitary 14 cm lesion
Colović 2013 [57] medium woman, gastric GIST, 20.5 cm cystic right-lobe metastasis imatinib-naive; partial excision only
Davies 2008 [180] medium gastric GIST with peritoneal seedlings biopsied at diagnostic laparoscopy; port-site metastasis later treatment-naive at laparoscopy
Sultan 2025 / Tajima 2016 / Wong 2002 [3,30,87] medium GIST cells in ascites identified by DOG1/CD117 on cell block gross disseminated disease; pleomorphic cells
Miller-Patterson 2017 [145] high (index event) pazopanib PRES with occipital haemorrhage, resolved renal cancer; no later anti-VEGF drug
Lee 2026 [146] / Imai 2022 [147] medium second VEGFR TKI after TKI-associated brain haemorrhage (fatal) / after non-haemorrhagic RPLS (no recurrence) different drugs and tumours
Silk 2014 [5]; Thamtorawat 2022 [6] medium ablation within 1 cm / 5 mm of major ducts (IRE) not GIST; smaller lesions
Hohenberger 2025, exon 11 + secondary subgroup [24] medium SIRT for TKI-resistant liver metastases; hepatic PFS 7 months in the index genotype TKI-exhausted; no size data
Reddy 2025 [154] medium woman in her 40s, solitary oligoprogressive liver lesion, SBRT with TKI continued sunitinib; one lesion

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  164. Vassos N, Jakob J, Kähler G, Reichardt P, Marx A, Dimitrakopoulou-Strauss A, et al. Preservation of Organ Function in Locally Advanced Non-Metastatic Gastrointestinal Stromal Tumors (GIST) of the Stomach by Neoadjuvant Imatinib Therapy. Cancers (Basel). 2021;13(4). doi:10.3390/cancers13040586. PMID 33546113. — Full text (open access, PMC) [retrieved; full text read]
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  168. Cameron S, Savvoukidis T, Armbrust T, Haller F, Kitz J, Füzesi L, et al. Analysis of a case with disappearance of the primary gastrointestinal stromal tumor and progressive liver metastases under long-term treatment with tyrosine kinase inhibitors. Med Oncol. 2010;27(2):213-8. doi:10.1007/s12032-009-9193-0. PMID 19294538. — Full text (repository, OA) (open access per Unpaywall; the publisher blocks automated checks) [retrieved; abstract/record level]
  169. Warakaulle DR, Gleeson F. MDCT appearance of gastrointestinal stromal tumors after therapy with imatinib mesylate. AJR Am J Roentgenol. 2006;186(2):510-5. doi:10.2214/AJR.04.1516. PMID 16423961. — Full text (subscription) [retrieved; abstract/record level]
  170. Werewka-Maczuga A, Stępień M, Urbanik A. Evaluation of Alterations in Tumor Tissue of Gastrointestinal Stromal Tumor (GIST) in Computed Tomography Following Treatment with Imatinib. Pol J Radiol. 2017;82:817-826. doi:10.12659/PJR.902944. PMID 29657650. — Full text (open access, PMC) [retrieved; full text read]
  171. Eslamy HK, Quon A. PET/CT imaging of gastrointestinal stromal tumor with calcified peritoneal implants after imatinib therapy. Clin Nucl Med. 2008;33(12):864-5. doi:10.1097/RLU.0b013e31818bf15c. PMID 19033789. — Full text (subscription) [retrieved; abstract/record level]
  172. Zhao S, Zhu H, Jiao R, Wu X, Zhang X, Ji G. Primary Tumor Resection Improves Survival in Patients With Metastatic Gastrointestinal Stromal Tumors: A Preliminary Population-Based Analysis. Front Oncol. 2020;10:1440. doi:10.3389/fonc.2020.01440. PMID 32974163. — Full text (open access, PMC) [retrieved; full text read]
  173. Gaitanidis A, Alevizakos M, Tsaroucha A, Pitiakoudis M. Outcomes After Surgical Resection Differ by Primary Tumor Location for Metastatic Gastrointestinal Stromal Tumors (GISTs): a Propensity Score Matching Population Study. J Gastrointest Cancer. 2019;50(4):750-758. doi:10.1007/s12029-018-0137-9. PMID 30033508. — Full text (subscription) [retrieved; abstract/record level]
  174. Sato S, Tsujinaka T, Yamamoto K, Takahashi T, Kishi K, Imamura H, et al. Primary surgery as a frontline treatment for synchronous metastatic gastrointestinal stromal tumors: an analysis of the Kinki GIST registry. Surg Today. 2016;46(9):1068-75. doi:10.1007/s00595-015-1282-4. PMID 26611538. — Full text (subscription) [retrieved; abstract/record level]
  175. Jakob J, Salameh R, Wichmann D, Charalambous N, Zygmunt AC, Kreisel I, et al. Needle tract seeding and abdominal recurrence following pre-treatment biopsy of gastrointestinal stromal tumors (GIST): results of a systematic review. BMC Surg. 2022;22(1):202. doi:10.1186/s12893-022-01648-2. PMID 35597932. — Full text (open access, PMC) [retrieved; full text read]
  176. van Houdt WJ, IJzerman NS, Schrijver AM, Huis In 't Veld E, Thway K, Jones RL, et al. Oncological Outcome After Diagnostic Biopsies in Gastrointestinal Stromal Tumors: A Retrospective Cohort Study. Ann Surg. 2021;274(6):e1093-e1098. doi:10.1097/SLA.0000000000003744. PMID 31850986. — Full text (repository, OA) [retrieved; abstract/record level]
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  186. Berger-Richardson D, Swallow CJ. Needle tract seeding after percutaneous biopsy of sarcoma: Risk/benefit considerations. Cancer. 2017;123(4):560-567. doi:10.1002/cncr.30370. PMID 27859013. — Full text (publisher, OA) [retrieved; abstract/record level]
  187. Iemoto Y, Kondo Y, Fukamachi S. Biliary cystadenocarcinoma with peritoneal carcinomatosis. Cancer. 1981;48(7):1664-7. doi:10.1002/1097-0142(19811001)48:7<1664::aid-cncr2820480731>3.0.co;2-o. PMID 6269722. — Full text (publisher, OA) [retrieved; abstract/record level]
  188. Deciphera Pharmaceuticals, LLC. A Master Protocol for the Multi-Cohort, Phase 1/2 Study of DCC-3116 in Combination With Anticancer Therapies in Participants With Advanced Malignancies. ClinicalTrials.gov identifier NCT05957367; status RECRUITING (record updated 2026-07-23). [retrieved; abstract/record level]
  189. GlaxoSmithKline. Individual Patient Expanded Access for Velzatinib (GSK6042981) in Patients With Gastrointestinal Stromal Tumours With KIT Mutations. ClinicalTrials.gov identifier NCT07825701; status AVAILABLE (record updated 2026-09-17). [retrieved; abstract/record level]
  190. Cogent Biosciences, Inc.. A Phase 3 Randomized, Open-Label, Multicenter Clinical Study of CGT9486+Sunitinib vs. Sunitinib in Subjects With Locally Advanced, Unresectable, or Metastatic Gastrointestinal Stromal Tumors. ClinicalTrials.gov identifier NCT05208047; status RECRUITING (record updated 2026-06-16). [retrieved; abstract/record level]
  191. Deciphera Pharmaceuticals, LLC. An International, Phase 3, Randomized, Multicenter, Open-label Study of Ripretinib vs Sunitinib in Patients With Advanced GIST With KIT Exon 11 and Co-occurring KIT Exons 17 and/or 18 Mutations Who Were Previously Treated With Imatinib. ClinicalTrials.gov identifier NCT05734105; status ACTIVE_NOT_RECRUITING (record updated 2025-12-17). [retrieved; abstract/record level]
  192. Universität Duisburg-Essen. Pilot Diagnostic Feasibility Trial of Resistance Profiling Using Functional Imaging and Next Generation Sequencing of Refractory GIST. ClinicalTrials.gov identifier NCT07109024; status NOT_YET_RECRUITING (record updated 2025-08-19). [retrieved; abstract/record level]
  193. European Organisation for Research and Treatment of Cancer - EORTC. Stereotactic Body Radiotherapy in Addition to Standard of Care Treatment in Patients With Rare Oligometastatic Cancers (OligoRARE): a Randomized, Phase 3, Open-label Trial. ClinicalTrials.gov identifier NCT04498767; status RECRUITING (record updated 2024-08-26). [retrieved; abstract/record level]
  194. University of California, Davis. Locally ablatiVe therApy in oLigO-pRogressive sOlid tUmorS (VALOROUS). ClinicalTrials.gov identifier NCT06103669; status RECRUITING (record updated 2026-07-08). [retrieved; abstract/record level]
  195. First Affiliated Hospital of Chongqing Medical University. A Multicenter, Single-arm, Prospective Study to Evaluate the Efficacy and Safety of Radiotherapy Combined With Ripretinib in the Treatment of Unresectable Advanced GIST. ClinicalTrials.gov identifier NCT06507683; status RECRUITING (record updated 2024-07-18). [retrieved; abstract/record level]
  196. Ningbo Newbay Technology Development Co., Ltd. A Multicenter, Open-label Clinical Study to Evaluate the Efficacy and Safety of NB003 in Patients With Advanced Gastrointestinal Stromal Tumors (GIST). ClinicalTrials.gov identifier NCT07379047; status RECRUITING (record updated 2026-06-10). [retrieved; abstract/record level]
  197. University of Miami. ctDNA-Guided Sunitinib And Regorafenib Therapy for Gastrointestinal Stromal Tumor (GIST). ClinicalTrials.gov identifier NCT05366816; status RECRUITING (record updated 2025-09-09). [retrieved; abstract/record level]
  198. Novelty Nobility, Inc.. A Phase 1 Dose Escalation and Expansion Study of the c-Kit Specific Antibody-Drug Conjugate NN3201 in Subjects With Advanced and/or Metastatic Solid Tumors Known to Express c-Kit. ClinicalTrials.gov identifier NCT06805825; status RECRUITING (record updated 2025-09-23). [retrieved; abstract/record level]
  199. Centre Leon Berard. A Prospective, Randomized, Multicenter, Comparative Study of the Efficacy of Imatinib Resumption Combined With Atezolizumab Versus Imatinib Resumption Alone in Patients With Unresectable Advanced Gastrointestinal Stromal Tumors (GIST) After Failure of Standard Treatments. ClinicalTrials.gov identifier NCT05152472; status RECRUITING (record updated 2026-09-10). [retrieved; abstract/record level]

The bracket at the end of each entry is the automatic verification status; raw records are in literature_raw/, and the verification, quote-extraction and preprint tables are in verification_tables.md. Case-record references [Dn] are the numbered documents of the case site (documents.html#dn).

All medical reports (docs_eng)

Google Drive folders (shared): docs_eng  ·  UKR_orig  ·  anastasia_disks  ·  2026_new  ·  Left_lobe_focus

Every clinical report from the Drive archive, in chronological order, full text as translated/stored on Drive; each entry opens the hosted page (which links to the Drive copy and the original); the small tags are direct Drive / original shortcuts. Ukrainian-only documents carry an English summary. PET-CT report pages also show image sheets from the study and link to the DICOM disc.

PART 1 — Uterine leiomyosarcoma diagnosis, chemotherapy, pazopanib and PRES (August 2022 – April 2023)

PART 2 — Diagnosis revised to GIST; imatinib (April 2023 – April 2024)

PART 3 — Continued imatinib, progression in 2026, genomic profiling and second opinions (2025 – September 2026)

Laboratory tests and other records

Latest tests — 01.10.2026, InVivo Clinic (creatinine and urinalysis, the day after the LISOD blood tests): results in English · original (PDF).

Blood: creatinine 71.7 µmol/L, within range (reference 41–73; eGFR ≈ 88). The LISOD value the day before was 86.5 (flagged high; different laboratory and reference range, so not strictly comparable).

Urinalysis: all within range — no protein, glucose or blood; microalbumin/creatinine 0.56 mg/mmol (limit 3.4); urine calcium 5.0 mmol/L (2.5–7.5); no casts, crystals or bacteria. Squamous epithelium 5–6 per field is slightly above the printed reference (usually sample contamination).

Blood tests — 30.09.2026, LISOD (complete blood count and biochemistry; baseline on the day regorafenib was dispensed): results in English · originals: blood count, biochemistry.

Outside the reference range: RBC 3.49 ×10¹²/L (L), MCV 101 fL (H), MCH 34.7 pg (H), lymphocytes 1.1 ×10⁹/L (L); glucose 6.9 mmol/L (H), creatinine 86.5 µmol/L (H; eGFR ≈ 70; normal, 71.7, on 01.10.2026 at another laboratory), AST 33.1 U/L (H, limit 32), LDH 278.8 U/L (H), ionised calcium 1.10 mmol/L (L). Within range: haemoglobin 121 g/L, WBC 5.4, platelets 216, ALT 20.1, bilirubin 4.5, ALP 66.9, GGT 16.7, albumin 42.8, sodium, potassium, chloride.

Laboratory tests — English translations hosted on this site (38 documents, 2022–2024)
Other hosted records: alternate imaging translations, cited publications, genomics note, clinic outreach log (8)
Laboratory tests — Ukrainian originals hosted on this site (2022–2025)
Consultation recordings (video/audio on Drive)

Also: clinic outreach log, Nov 2022 – Feb 2023 [hosted copy] (which centres were contacted for a second opinion and what they answered).

All original documents hosted on this site (144 files: scans, photos, PDFs — reduced size; full-resolution copies stay on Drive)

Documents not reproduced here

Laboratory results are hosted under Laboratory tests and other records; the OpenEvidence conversation is hosted as a PDF and summarised in the evidence review.