This document provides information about bladder cancer, including its definition, causes, pathogenesis, clinical manifestations, diagnostic evaluations, and management. Bladder cancer most often presents as transitional or papillary tumors in the bladder lining that may infiltrate the bladder wall. Diagnostic evaluations include cystoscopy, urine cytology, and imaging tests to stage the cancer. Treatment involves surgical resection of superficial tumors, radical cystectomy for invasive tumors, and intravesical chemotherapy or immunotherapy to prevent recurrence.