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.