Early-Line Anti-EGFR Therapy to Facilitate Retreatment for Select Patients With mCRC

The study will use previously established doses of panitumumab or cetuximab in the metastatic setting for the treatment of unresectable colorectal cancer (CRC). It is designed to investigate an alternative treatment strategy to maximize the benefit to inhibition of epidermal growth factor receptor (EGFR) for a highly selected patient population. It will enroll 71 participants with left-sided, unresectable metastatic CRC. Participants will be on study up to 5 years.