Urine Cytology

Most of the time, the sample is collected as clean catch urine sample in your doctor’s office or at home. This is done by urinating into a special container. The clean-catch method is used to prevent germs from the penis or vagina from getting into a urine sample. To collect your urine, the health care provider may give you a special clean-catch kit that contains a cleansing solution and sterile wipes. Follow instructions exactly so that the results are accurate.

The urine sample can also be collected during cystoscopy. During this procedure, your health care provider uses a thin tube-like instrument with a camera on the end to examine the inside of your bladder.

The urine sample is sent to a lab and examined under a microscope to look for abnormal cells.

Source: http://www.nlm.nih.gov/medlineplus/ency/article/003905.htm