PDGFRA D842V-mutant GIST
Prepared with OnCo (onco.cc/prep/gist-pdgfra-d842v/). 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
15 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 PDGFRA exon 18 D842V mutation, Weak or absent KITstaining with positive DOG1, Epithelioid histology, Mitotic count and size, Secondary PDGFRA mutations at progression on avapritinib), 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, resectable), which of the standard options do you recommend and why?
- 6.For my situation (advanced, first line), which of the standard options do you recommend and why?
- 7.Am I a candidate for Avapritinib, and what side effects should I expect?
- 8.For my situation (progression on avapritinib), which of the standard options do you recommend and why?
- 9.Am I a candidate for Regorafenib, and what side effects should I expect?
- 10.How do the results of VOYAGER apply to someone like me?
- 11.Are there clinical trials I could join, for example of Avapritinib, Liquid biopsy (ctDNA), IDRX-42?
- 12.Would a second opinion at a high-volume centre change anything, and can you help arrange it?
- 13.What supportive care (symptom control, nutrition, exercise, mental health, financial help) is available from the start?
- 14.I read that “No proven therapy after progression on avapritinib”. How does that affect my plan?
- 15.I read that “Cognitive side effects limit dose and quality of life for some patients”. How does that affect my plan?
Tests and results to bring
Biomarker results to ask for: PDGFRA exon 18 D842V mutation (defines the subtype and excludes imatinib), Weak or absent KIT (CD117) staining with positive DOG1, Epithelioid histology, Mitotic count and size (risk, though behaviour is often indolent), Secondary PDGFRA mutations at progression on avapritinib.
Scans and tests linked to this cancer: Liquid biopsy (ctDNA).
Bring copies of scan reports, pathology and blood results, and a list of every medicine and supplement.
The treatments I may be offered
- Localised, resectable: Surgical resection; no adjuvant imatinib because the mutation is resistant to it. (Robotic & minimally invasive surgery, PDGFRA)
- Advanced, first line: Avapritinib 300 mg daily (NAVIGATOR), with monitoring for cognitive effects and bleeding. (Avapritinib, PDGFRA, KIT)
- Progression on avapritinib: No established therapy; clinical trials, surgery or embolisation for isolated progression; regorafenib and other kinase inhibitors have low activity. (Regorafenib, VOYAGER, Liquid biopsy (ctDNA))
From the standard of care recorded for this cancer; which apply depends on your stage and biomarkers. Ask which the team recommends and why.