An extended lymphadenectomy – removal of additional lymph nodes beyond the extent of the standard procedure – in patients undergoing radical cystectomy (removal of bladder and nearby tissues) because of clinically localized muscle-invasive bladder cancer provides no patient benefit as measured by disease-free survival or overall survival times. It does, however, increase the risk of adverse events (side effects) and post-surgical death. These primary results from the phase 3 SWOG S1011 clinical trial are being delivered in an oral presentation at the 2023 annual meeting of the American Society of Clinical Oncology in Chicago on June 5 (Abstract 4508).