The prevailing cost of a particular medical service in a given geographical area. If you use a non-participating physician, you may be responsible for your copayment and/or coinsurance plus the difference between the amount charged and the usual and customary amount paid by your plan. Also called usual, customary and reasonable.

A procedure in which high-energy sound waves (ultrasound) are bounced off internal tissues or organs and make echoes. The echo patterns are shown on the screen of an ultrasound machine, forming a picture of body tissues called a sonogram. Also called ultrasonography.

A term used to describe cells or tissues that do not have specialized ("mature") structures or functions. Undifferentiated cancer cells often grow and spread quickly.

Unable to be removed with surgery.

The tube through which urine leaves the body. It empties urine from the bladder.

The prevailing cost of a particular medical service in a given geographical area. If you use a non-participating physician, you may be responsible for your copayment and/or coinsurance plus the difference between the amount charged and the usual and customary amount paid by your plan. Also called UCR.

Cancer that forms in tissues of the uterus (small, hollow, pear-shaped organ in a woman's pelvis in which a baby grows). Two types of uterine cancer are endometrial cancer (cancer that begins in cells lining the uterus) and uterine sarcoma (a rare cancer that begins in muscle or other tissues in the uterus).