Cystoscopy, also called a cystourethroscopy or, more simply, a bladder scope, is a test that measures the health of the urethra and bladder.
The procedure involves inserting a tube into the urethra through the opening at the end of the penis. It allows the doctor to visually examine the complete length of the urethra and the bladder for polyps, strictures (narrowing), abnormal growths, and other problems.