A drug that delivers chemotherapy directly to tumors has shown impressive activity against some of the hardest-to-reach cancer cells: those that have spread to the brain in patients with advanced HER2-positive breast cancer. The findings, from an international clinical trial, reinforce earlier findings of the benefits of the drug -- trastuzumab deruxtecan (T-DXd), an antibody-drug conjugate -- in these patients, trial leaders say.
