Nonprimary pT1 Nonmuscle Invasive Bladder Cancer Treated With Bacillus Calmette-Guerin is Associated With Higher Risk of Progression Compared to Primary T1 Tumors

Nonprimary T1 nonmuscle invasive bladder tumors treated with bacillus Calmette-Guerin carry a significantly higher risk of progression to muscle invasive disease compared to primary tumors. This information may be used in combination with other prognostic factors to identify those at high risk for progression when counseling patients.