Impact of Bladder Neck Involvement on Recurrence in Patients With Non-muscle-invasive Bladder Cancer: An Analysis Based on a Time-dependent Model.

Tumor location in bladder neck has reported to be a prognostic factor for non-muscle-invasive bladder cancer (NMIBC). We investigated the impact of bladder neck involvement (BNI) on recurrence in NMIBC using time-dependent covariate analysis.