Comparing Amivantamab Plus Chemotherapy Versus Cetuximab Plus Chemotherapy for Adults With KRASNRAS and BRAF Wild-type Unresectable or Metastatic Left-sided Colorectal Cancer

What this Trial Is About

Researchers are evaluating how long adult participants with KRASNRAS and BRAF wild-type unresectable or metastatic left-sided colorectal cancer remain disease-free when treated with different combinations of drugs. The study compares amivantamab combined with chemotherapy regimens mFOLFOX6 or FOLFIRI versus cetuximab combined with the same chemotherapy regimens. This phase 3 trial aims to understand which treatment approach may better delay cancer progression. Participants will be randomly assigned to one of two treatment groups. One group receives amivantamab along with chemotherapy cycles consisting of 5-fluorouracil, leucovorin calcium or levoleucovorin, and oxaliplatin or irinotecan hydrochloride, repeated every 28 days. The other group receives cetuximab combined with the same chemotherapy regimens, also in 28-day cycles. Treatments continue until imaging shows disease progression or other criteria require stopping. During the study, participants will undergo regular assessments including radiographic imaging to monitor disease status and treatment effects. Researchers will measure progression-free survival for up to over 4 years, along with other outcomes such as overall survival, response rates, duration and time to response, and quality of life using validated questionnaires. Safety will be monitored through adverse event reporting and laboratory tests, with follow-up continuing for several years to capture long-term results.

A Study of Amivantamab and mFOLFOX6 or FOLFIRI Versus Cetuximab and mFOLFOX6 or FOLFIRI as First-line Treatment in Participants With KRAS/NRAS and BRAF Wild-type Unresectable or Metastatic Left-sided Colorectal Cancer