LY3214996 and Cetuximab Alone or in Combination With Abemaciclib for the Treatment of Unresectable or Metastatic Colorectal Cancer

This phase Ib/II trial investigates the side effects and best dose of LY3214996 when given together with cetuximab alone or in combination with abemaciclib and to see how well they work in treating patients with colorectal cancer that cannot be removed by surgery (unresectable) and/or has spread to other places in the body (metastatic). Cetuximab is a monoclonal antibody that may interfere with the ability of tumor cells to grow and spread. LY3214996 and abemaciclib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Giving LY3214996 and cetuximab alone or in combination with abemaciclib may help treat patients with colorectal cancer.