To utilize the therascreen KRAS RGQ PCR Kit, as a screening test in Amgen's Phase 3 Clinical Study Protocol 20210081, in order to identify patients with mCRC KRAS G12C mutation positive tumors to be enrolled in the drug clinical trial. Results of the Phase 3 Amgen Study 20210081 will serve as the basis for establishing the clinical performance of the therascreen® KRAS RGQ PCR Kit as a companion diagnostic (CDx) for the identification of patients with metastatic colorectal cancer, who may benefit from treatment with sotorasib.

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.

Inclusion Criteria:

• Subjects who consent to participate in the eligibility screen for Protocol 20210081 will have their tumor tissue tested for the presence of KRAS G12C mutation under the proposed performance study.

Exclusion Criteria:

• There is no separate inclusion and exclusion criteria for the performance study.