Sarcomas (soft tissue, bone, GIST)
Prepared with OnCo (onco.cc/prep/sarcoma/). Orientation, not medical advice; your team knows your case.
My details
What I know, what is unclear, changes to discuss
Saved in this browserMy questions
39 on the sheet- 1.What is my exact diagnosis, stage, and grade, and which tests established them?
- 2.Which biomarkers have been tested on my tumour (for example Histologic subtype, KIT/PDGFRA, MAGE-A4 + HLA-A*02, NTRK fusions, INI1 loss), and what were the results?
- 3.Which subtype is my cancer, and does that change the recommended treatment?
- 4.Is germline (inherited) genetic testing recommended for me or my family?
- 5.For my situation (localised sts), which of the standard options do you recommend and why?
- 6.For my situation (advanced), which of the standard options do you recommend and why?
- 7.Am I a candidate for Imatinib, Afamitresgene autoleucel, and what side effects should I expect?
- 8.For my situation (localised extremity/trunk soft-tissue sarcoma, low grade), which of the standard options do you recommend and why?
- 9.For my situation (localised high-risk soft-tissue sarcoma (grade 3, >5 cm, deep)), which of the standard options do you recommend and why?
- 10.Am I a candidate for Doxorubicin, Ifosfamide, and what side effects should I expect?
- 11.How do the results of ISG-STS 1001 apply to someone like me?
- 12.For my situation (advanced soft-tissue sarcoma, first line), which of the standard options do you recommend and why?
- 13.Am I a candidate for Doxorubicin, Ifosfamide, Trabectedin, and what side effects should I expect?
- 14.How do the results of ANNOUNCE apply to someone like me?
- 15.For my situation (advanced soft-tissue sarcoma, later lines), which of the standard options do you recommend and why?
- 16.Am I a candidate for Trabectedin, Pazopanib, Pembrolizumab or related drugs, and what side effects should I expect?
- 17.How do the results of IGNYTE-ESO apply to someone like me?
- 18.For my situation (gist, localised), which of the standard options do you recommend and why?
- 19.Am I a candidate for Imatinib, and what side effects should I expect?
- 20.How do the results of SSGXVIII/AIO (adjuvant imatinib in GIST) apply to someone like me?
- 21.For my situation (gist, advanced), which of the standard options do you recommend and why?
- 22.Am I a candidate for Imatinib, Ripretinib, Avapritinib, and what side effects should I expect?
- 23.How do the results of INVICTUS and INSIGHT apply to someone like me?
- 24.For my situation (osteosarcoma), which of the standard options do you recommend and why?
- 25.Am I a candidate for Doxorubicin, and what side effects should I expect?
- 26.For my situation (ewing sarcoma), which of the standard options do you recommend and why?
- 27.Am I a candidate for Doxorubicin, Ifosfamide, and what side effects should I expect?
- 28.How do the results of INT-0091 (Ewing sarcoma) and Euro Ewing 2012 apply to someone like me?
- 29.For my situation (desmoid tumour), which of the standard options do you recommend and why?
- 30.Am I a candidate for Nirogacestat, and what side effects should I expect?
- 31.How do the results of DeFi apply to someone like me?
- 32.For my situation (tenosynovial giant cell tumour), which of the standard options do you recommend and why?
- 33.Am I a candidate for Vimseltinib, and what side effects should I expect?
- 34.How do the results of MOTION apply to someone like me?
- 35.Are there clinical trials I could join, for example of FAP-2286 (177Lu / 68Ga), Carbon-ion therapy, HS-20093, Gotistobart?
- 36.Would a second opinion at a high-volume centre change anything, and can you help arrange it?
- 37.What supportive care (symptom control, nutrition, exercise, mental health, financial help) is available from the start?
- 38.I read that “Rarity limits trials”. How does that affect my plan?
- 39.I read that “Chemoresistance of most subtypes”. How does that affect my plan?
The words I may hear
- Objective response rate (ORR): Objective response rate (ORR) is the percentage of patients whose tumours shrink by at least 30%.
- Sarcoma (tissue type): Cancer of the body's connective and supporting tissues: bone, muscle, fat, cartilage, blood vessels, fibrous tissue.
- Histotype-tailored therapy: Histotype-tailored therapy means choosing treatment by the specific sarcoma subtype (there are more than 70) rather than treating all sarcomas alike.
- Wide local excision: Cutting out a tumour together with a measured rim of normal-looking tissue around it, so that microscopic spread at the edge is removed too.
- Limb-salvage surgery: Removing a bone or soft-tissue sarcoma while keeping the arm or leg, rebuilding the bone with a metal endoprosthesis or a graft.
- FNCLCC grade (soft-tissue sarcoma): The FNCLCC grade is a 1-to-3 score for soft-tissue sarcomas based on how abnormal, how fast-dividing, and how much dead tissue the tumour shows; grade drives whether chemotherapy is considered.
- Progression-free survival (PFS): Progression-free survival (PFS) is how long patients live without their cancer growing.
- HLA-A*02:01 restriction: Some T-cell-receptor drugs only work in people with a particular immune 'tissue type'.
- Dose-dense and metronomic chemotherapy: Two opposite ways of rescheduling the same drugs: dose-dense gives standard doses more often (every two weeks instead of three, supported by growth factors) to deny the tumour recovery time; metronomic gives small doses continuously to attack tumour blood vessels with little toxicity.
- Second cancers after radiotherapy: Radiotherapy can itself cause a new cancer in the treated area, typically ten to thirty years later.
Tests and results to bring
Biomarker results to ask for: Histologic subtype, KIT/PDGFRA (GIST), MAGE-A4 + HLA-A*02, NTRK fusions, INI1 loss, CDK4/MDM2 amplification (liposarcoma), Histologic subtype and FNCLCC grade, KIT/PDGFRA mutation and secondary mutations (tissue or ctDNA) in GIST, SS18-SSX, EWSR1-FLI1, FUS-DDIT3, ASPSCR1-TFE3 fusions, MAGE-A4 or NY-ESO-1 expression + HLA-A*02 for TCR-T, INI1 (SMARCB1) loss, MDM2/CDK4 amplification (liposarcoma), CTNNB1/APC mutation (desmoid), CSF1 translocation (TGCT), Sarculator nomogram risk.
Scans and tests linked to this cancer: Comprehensive genomic profiling, Liquid biopsy (ctDNA), Intraoperative MRI and CT, Strain echocardiography (global longitudinal strain), Troponin and natriuretic peptide monitoring during cancer treatment, FAPI PET.
Bring copies of scan reports, pathology and blood results, and a list of every medicine and supplement.
The treatments I may be offered
- Localised STS: Wide excision + radiation; neoadjuvant chemotherapy for high-risk. (IMRT / IGRT (modern external beam), Proton therapy, Hyperthermia)
- Localised extremity/trunk soft-tissue sarcoma, low grade: Wide resection (limb-salvage) ± radiotherapy for margins or size >5 cm; observation thereafter. (Limb-salvage surgery and endoprosthetic reconstruction, IMRT / IGRT (modern external beam), FNCLCC grade (soft-tissue sarcoma))
- GIST, localised: Resection; adjuvant imatinib 3 years for high risk (SSGXVIII), longer under study; none for PDGFRA D842V or SDH-deficient (imatinib-insensitive). (Imatinib, SSGXVIII/AIO (adjuvant imatinib in GIST))
- Localised high-risk soft-tissue sarcoma (grade 3, >5 cm, deep): Neoadjuvant anthracycline-ifosfamide × 3 (ISG-STS 1001) ± preoperative radiotherapy, then wide resection; regional hyperthermia with chemotherapy where available (EORTC 62961). (ISG-STS 1001, Doxorubicin, Ifosfamide, IMRT / IGRT (modern external beam), Hyperthermia, Limb-salvage surgery and endoprosthetic reconstruction)
- Advanced: Doxorubicin ± ifosfamide; subtype-directed: imatinib, afami-cel, larotrectinib (tazemetostat was withdrawn in March 2026). (Imatinib, Afamitresgene autoleucel)
- Advanced soft-tissue sarcoma, first line: Doxorubicin 75 mg/m2 (single agent) or doxorubicin-ifosfamide for symptomatic/rapid disease (EORTC 62012: PFS but not OS benefit); histotype exceptions: trabectedin or gemcitabine-docetaxel for leiomyosarcoma, paclitaxel for angiosarcoma. Adding olaratumab to doxorubicin gave no survival benefit (ANNOUNCE). (Doxorubicin, Ifosfamide, Trabectedin, ANNOUNCE, Histotype-tailored therapy)
- GIST, advanced: Imatinib 400 mg (800 mg for exon 9) → sunitinib → regorafenib → ripretinib (INVICTUS); avapritinib for PDGFRA D842V; ctDNA KIT genotyping to choose ripretinib vs sunitinib second line (INSIGHT); surgery for oligoprogression. (Imatinib, Ripretinib, INVICTUS, INSIGHT, Avapritinib, ctDNA KIT genotyping → TKI selection in GIST)
- Osteosarcoma: Neoadjuvant MAP (methotrexate, doxorubicin, cisplatin) → limb-salvage resection → adjuvant MAP; no benefit from adding ifosfamide-etoposide or interferon (EURAMOS-1); metastatic/relapsed: surgery of lung metastases, regorafenib/cabozantinib. (Doxorubicin, Limb-salvage surgery and endoprosthetic reconstruction, Children's Oncology Group (COG))
- Ewing sarcoma: Interval-compressed VDC/IE (INT-0091, AEWS0031, Euro Ewing 2012) with surgery and/or radiotherapy for local control; high-dose busulfan-melphalan for selected high-risk (Euro-EWING 99 R2); relapse: irinotecan-temozolomide, cabozantinib, trials. (INT-0091 (Ewing sarcoma), Euro Ewing 2012, Doxorubicin, Ifosfamide, Proton therapy)
- Desmoid tumour: Active surveillance first (many regress); nirogacestat (DeFi) for progressing symptomatic disease; sorafenib alternative; surgery only for select sites; cryoablation for extra-abdominal tumours. (Nirogacestat, DeFi, Thermal ablation (RFA, microwave, cryo), Intermittent or stop-and-restart nirogacestat in desmoid tumours)
- Tenosynovial giant cell tumour: Surgery for localised disease; vimseltinib (MOTION) or pexidartinib (REMS for hepatotoxicity) for diffuse disease not amenable to surgery. (Vimseltinib, MOTION)
- Advanced soft-tissue sarcoma, later lines: Trabectedin (L-sarcomas), eribulin (liposarcoma), pazopanib (non-adipocytic), gemcitabine-docetaxel, dacarbazine; pembrolizumab for alveolar soft-part sarcoma or UPS; larotrectinib for NTRK fusion; afami-cel or lete-cel for MAGE-A4/NY-ESO-1+ synovial sarcoma and MRCLS. (Trabectedin, Pazopanib, Pembrolizumab, Afamitresgene autoleucel, Letetresgene autoleucel, IGNYTE-ESO)
From the standard of care recorded for this cancer; which apply depends on your stage and biomarkers. Ask which the team recommends and why.