The proposed device clinical performance study and the medicinal clinical trial will be conducted simultaneously as a combined trial according to MDCG 2022-10. The clinical trial 20210081 is a Randomized, Open-label, Active-controlled Study of Sotorasib, Panitumumab and FOLFIRI Versus FOLFIRI With or Without Bevacizumab-awwb for Treatment-naïve Subjects with Metastatic Colorectal Cancer with KRAS p.G12C Mutation (CodeBreaK 301). It is estimated that approximately 450 patients from 31 countries will be enroled based on the presence of tumor KRAS G12C mutation, detected using therascreen KRAS RGQ PCR Kit, along with other clinical trial inclusion criteria, into the Phase III clinical trial. Results from the Phase 3 Amgen Study 20210081 will be used to evaluate the clinical performance of therascreen® KRAS RGQ PCR Kit as a CDx device for identification of patients with mCRC who may benefit from treatment with sotorasib in treatment-naïve patients with metastatic colorectal cancer.