Alternating Oxaliplatin and Irinotecan Chemotherapy Combined With Capecitabine and Bevacizumab for Microsatellite-stable Stage IV Metastatic Colon Cancer With a BRAF V600E Mutation: Two Case Reports Indicating Survival Improvement over Standard Thera

The two cases suggest that an alternating chemotherapy regimen of oxaliplatin and irinotecan, combined with capecitabine and bevacizumab is effective in the treatment of MSS, BRAF V600E-mutated stage IV metastatic CRC. The progression-free survival was significantly prolonged (both exceeding 20 months) compared to the first-line standard chemotherapy regimen for this disease. With a good balance between toxicity and efficacy, this alternating chemotherapy regimen can be considered as a potential first-line option for microsatellite-stable metastatic colon cancer.