Breast Cancer Glossary of Medical Terms
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Ultrasonography (ultrasound): An imaging method that uses high-frequency waves to image the breast or other parts of the body. High-frequency sound waves are transmitted from a transducer through the area of the body being studied. The sound wave echoes are picked up and displayed on a computer monitor or television screen. Ultrasound is a painless method that is sometimes useful in distinguishing fluid-filled cysts from solid tumors. Ultrasound involves no exposure to radiation.
Unifocal: Term used to describe cancer that is present in only one spot in the breast.
Unilateral: Affecting one side of the body. For example, unilateral breast cancer occurs in only one breast. (See also bilateral).
Unproven methods of cancer management: See therapy, unproven.
Updated: August 2006