This document provides information on bladder cancer, including benign bladder tumors, risk factors, symptoms, diagnosis, staging, and treatment of non-muscle-invasive bladder cancer. It discusses various benign bladder tumors such as epithelial metaplasia, leukoplakia, inverted papilloma, and their characteristics. Major risk factors for bladder cancer mentioned are smoking, occupational exposures, infections, and certain genetic factors. Cystoscopy and biopsy are important for diagnosis and staging. Treatment of non-muscle-invasive bladder cancer involves transurethral resection of bladder tumors.