Bladder Neoplasms

The purpose of this study is to determine if analysis of DNA and protein material found in urine will be useful in the detection of urothelial cancer of the bladder and kidney. This analysis may be helpful to determine if how a particular cancer will act regarding remission and recurrence

This is a Phase II, single-arm, study of pembrolizumab as maintenance therapy in muscle-invasive bladder cancer (MIBC) participants who have received maximum TURBT and tri-modality treatment (TMT) and achieved CR. All participants will receive pembrolizumab monotherapy per 21 days no longer than 17 cycles until disease progression or death.