RecruitingClinical trialTumor-informed ctDNA in Muscle-invasive Bladder Cancer for Evaluation of Residual/Recurrent Disease - the TiMBER TrialThis study investigates the feasibility of the Labcorp Plasma Detect, which is an assay (test) that looks for circulating tumor DNA (ctDNA) in patients who have muscle-invasive (MI) urothelial carcinoma (also known as MI bladder cancer, MIBC). During this study, tissue, blood and urine samples will also be analyzed to help the study team better understand this type of cancer and a patient's response to treatment.