Narrow-band Imaging Diagnostic Classification System for Bladder Tumors

The goal of this observational study is to learn about the morphological characteristics of different bladder lesions under narrow-band imaging（NBI） techniques in All patients requiring cystoscopy and biopsy. The main questions it aims to answer are: 1. To clarify the characteristics of different bladder lesions under NBI and to establish a diagnostic classification system for bladder tumors under NBI based on pathological findings. 2. Verify the accuracy of this classification system. Participants will record the morphological characteristics under ordinary white light and NBI during cystoscopy, analyze the pathological characteristics of different tissues corresponding to the NBI characteristics, establish a diagnostic classification system for bladder tumor under NBI using pathological biopsy as the diagnostic standard, and then verify the accuracy of this classification standard through clinical.