KRAS G12C-mutant colorectal cancer
Prepared with OnCo (onco.cc/prep/kras-g12c-colorectal/). 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
18 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 KRAS G12C by tumour or circulating tumour DNA sequencing, Extended RAS testingbefore any anti-EGFR antibody, Co-mutationsand acquired RAS or MAPK alterations at progression, Mismatch repair status), 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 (metastatic, previously treated), which of the standard options do you recommend and why?
- 6.Am I a candidate for Sotorasib, Panitumumab, Adagrasib or related drugs, and what side effects should I expect?
- 7.How do the results of CodeBreaK 300 and Phase 1/2 Study of MRTX849 in Patients With Cancer Having a KRAS G12C Mutation KRYSTAL-1 apply to someone like me?
- 8.For my situation (metastatic, first line), which of the standard options do you recommend and why?
- 9.Am I a candidate for FOLFOX (5-FU, leucovorin, oxaliplatin), FOLFIRI (5-FU, leucovorin, irinotecan), CAPOX (capecitabine, oxaliplatin) or related drugs, and what side effects should I expect?
- 10.How do the results of Study of Sotorasib, Panitumumab and FOLFIRI Versus FOLFIRI With or Without Bevacizumab-awwb in Treatment-naïve Participants With Metastatic Colorectal apply to someone like me?
- 11.For my situation (later lines), which of the standard options do you recommend and why?
- 12.Am I a candidate for Trifluridine/tipiracil, Fruquintinib, Regorafenib, and what side effects should I expect?
- 13.How do the results of SUNLIGHT and FRESCO-2 apply to someone like me?
- 14.Are there clinical trials I could join, for example of Study of Sotorasib, Panitumumab and FOLFIRI Versus FOLFIRI With or Without Bevacizumab-awwb in Treatment-naïve Participants With Metastatic Colorectal, Phase 3 Study of MRTX849 With Cetuximab vs Chemotherapy in Patients With Advanced Colorectal Cancer With KRAS G12C Mutation (KRYSTAL-10), Divarasib, Olomorasib?
- 15.Would a second opinion at a high-volume centre change anything, and can you help arrange it?
- 16.What supportive care (symptom control, nutrition, exercise, mental health, financial help) is available from the start?
- 17.I read that “Responses last months, not years; acquired RAS and MAPK alterations drive resistance”. How does that affect my plan?
- 18.I read that “G12D, the commonest colorectal KRAS allele, has no approved drug”. How does that affect my plan?
The words I may hear
- Next-generation sequencing (NGS): Reading millions of DNA fragments in parallel, the engine behind every modern genomic test.
- Sidedness (left vs right colon): Where in the colon a tumour starts changes its biology and which drugs work.
- Circulating tumour DNA (ctDNA): Circulating tumour DNA (ctDNA) consists of fragments of DNA shed by tumour cells into the blood, detectable with sensitive sequencing.
Tests and results to bring
Biomarker results to ask for: KRAS G12C by tumour or circulating tumour DNA sequencing, Extended RAS testing (KRAS and NRAS exons 2, 3 and 4) before any anti-EGFR antibody, Co-mutations (TP53, APC, PIK3CA) and acquired RAS or MAPK alterations at progression, Mismatch repair status.
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
- Metastatic, first line: FOLFOX, FOLFIRI or CAPOX with bevacizumab, as for any RAS-mutant colorectal cancer; anti-EGFR antibodies are not used; KRAS G12C combinations are under test first line (CodeBreaK 301). (FOLFOX (5-FU, leucovorin, oxaliplatin), FOLFIRI (5-FU, leucovorin, irinotecan), CAPOX (capecitabine, oxaliplatin), Bevacizumab, Study of Sotorasib, Panitumumab and FOLFIRI Versus FOLFIRI With or Without Bevacizumab-awwb in Treatment-naïve Participants With Metastatic Colorectal)
- Metastatic, previously treated: Sotorasib plus panitumumab (CodeBreaK 300) or adagrasib plus cetuximab (KRYSTAL-1) after fluoropyrimidine, oxaliplatin and irinotecan. (CodeBreaK 300, Phase 1/2 Study of MRTX849 in Patients With Cancer Having a KRAS G12C Mutation KRYSTAL-1, Sotorasib, Panitumumab, Adagrasib, Cetuximab, KRAS & RAS inhibitors)
- Later lines: Trifluridine-tipiracil with bevacizumab (SUNLIGHT), fruquintinib (FRESCO-2) or regorafenib; clinical trials of next-generation RAS inhibitors. (SUNLIGHT, FRESCO-2, Trifluridine/tipiracil, Fruquintinib, Regorafenib)
From the standard of care recorded for this cancer; which apply depends on your stage and biomarkers. Ask which the team recommends and why.