Alexandria

Researchers are evaluating the drug disitamab vedotin, alone or combined with pembrolizumab, to treat urothelial cancer that expresses HER2. This cancer is locally advanced, cannot be removed by surgery, or has spread to other parts of the body. The study aims to see how well the drug works and how safe it is for participants by monitoring side effects and treatment responses. Participants will receive disitamab vedotin through an intravenous (IV) infusion every two weeks. Pembrolizumab, when given, is administered by IV on the first day of each six-week cycle. The study includes several groups, called cohorts, each with different treatment histories and eligibility criteria. Treatment and evaluation may continue for about two years. During the study, participants will have regular tests including scans to measure tumor response, lab tests, heart function checks, and monitoring for adverse events. Researchers will also track drug levels in the blood and any changes in heart function. The study will assess confirmed tumor responses and safety outcomes over approximately two years, with close monitoring to understand how participants respond to the treatments and any side effects experienced.