Validation of BIAS and IBCG criteria for predicting high-grade recurrence in low-grade NMIBC eligible for active surveillance.
PURPOSE We evaluated the performance of two scoring systems-the Bladder Cancer Italian Active Surveillance (BIAS) criteria and the International Bladder Cancer Group (IBCG) score-for predicting high-grade (HG) disease at recurrence in patients with primary low-grade (LG) non-muscle-invasive bladder cancer eligible for...