IORA: A011801 The COMPASSHER2 Trials (COMprehensive Use of Pathologic Response ASSessment to Optimize Therapy in HER2-Positive Breast Cancer): COMPASSHER2 Residual Disease (RD), A Double-Blinded, Phase III Randomized Trial of T-DM1 and Placebo Compared…
This phase III trial compares the effect of usual treatment with trastuzumab emtansine (T-DM1) alone vs. T-DM1 in combination with tucatinib. T-DM1 is a monoclonal antibody, called trastuzumab, linked to a chemotherapy drug, called DM1. Trastuzumab is a form of targeted therapy because it attaches to specific molecules (receptors) on the surface of cancer cells, known as HER2 receptors, and delivers DM1 to kill them. Tucatinib is in a class of medications called kinase inhibitors. It blocks HER2, which may help keep cancer cells from growing and may kill them. Giving T-DM1 in combination with tucatinib may work better in preventing breast cancer from relapsing in patients with HER2 positive breast cancer compared to T-DM1 alone.