The purpose of this study is to evaluate the study drug, DS-8201a (also known as Enhertu or fam-trastuzumab deruxtecan-nxki) for advanced solid tumors. The study aims to see how DS-8201a affects the levels of certain proteins and immune cells in solid tumors, how well it works against cancer cells, and how safe and tolerable it is.
The United States Food and Drug Administration (FDA) has approved DS-8201a for the treatment of patients with advanced HER2-positive breast or gastric cancer.