Cystoscopy is a test that allows your doctor to look at the inside of the bladder and the urethra using a thin, lighted instrument called a cystoscope.
The cystoscope is inserted into your urethra and slowly advanced into the bladder. Cystoscopy allows your doctor to look at areas of your bladder and urethra that usually do not show up well on X-rays. Tiny surgical instruments can be inserted through the cystoscope that allow your doctor to remove samples of tissue (biopsy) or samples of urine.
Small bladder stones and some small growths can be removed during cystoscopy. This may eliminate the need for more extensive surgery.