RecruitingPhase 2Drug trialCetuximab Plus Irinotecan in Patients With NeoRAS Wild-type Metastatic Colorectal Cancer In Third-line TherapyThis is a single-arm, open-label, phase II clinical trial. The goal of this study is to evaluate the efficacy and safety of cetuximab plus irinotecan in patients with NeoRAS wild-type primary left-sided mCRC in third-line therapy.