This document provides information about cystoscopy and urethroscopy procedures. It defines cystoscopy as an examination of the inside of the bladder using a cystoscope, which is a thin instrument with a lens and light. Urethroscopy examines the inside of the upper urinary tract including the ureters and renal pelvis using a ureteroscope. Cystoscopy and urethroscopy can be performed rigidly or flexibly to evaluate issues like blood in the urine, infections, or abnormalities. The document outlines the procedures and anatomy of the urinary tract and discusses common reasons for requiring cystoscopy or urethroscopy like stones, tumors, or blockages.