(ACCRU-GI-1617) MOUNTAINEER: A Phase II, Open Label Study of Tucatinib Combined with Trastuzumab in Patients with HER2+ Metastatic Colorectal Cancer
This phase II trial studies how well the HER2 inhibitor tucatinib (ONT-380, ARRY-380) works in combination with trastuzumab in treating patients with HER2-positive (HER2+) metastatic colorectal cancer (CRC). Tucatinib may stop the growth of tumor cells by blocking HER2, a receptor needed for cell growth in patients with HER2+ tumors. Monoclonal antibodies, such as trastuzumab, may interfere with the ability of HER2+ tumor cells to grow and spread. Giving tucatinib and trastuzumab in combination may work better in treating patients with HER2+ metastatic CRC.