U

Ultrasonography: A procedure in which sound waves (called ultrasound) are bounced off tissues and the echoes produce a picture (sonogram).

Ultrasound-guided Biopsy: A biopsy procedure that uses an ultrasound imaging device to find an abnormal area of tissue and guide its removal for examination under a microscope.

V

Vaccine: A substance or group of substances meant to cause the immune system to respond to a tumor or to microorganisms, such as bacteria or viruses. A vaccine can help the body recognize and destroy cancer cells or microorganisms.

W

X

X-ray: A type of high-energy radiation. In low doses, x-rays are used to diagnose diseases by making pictures of the inside of the body. In high doses, x-rays are used to treat cancer.

Y

Z

Dictionary

A-BC-D-EF-G-H-I-J-KL-M-NO-P-QR-S-TU-V-W-X-Y-Z

Please note that the above definitions were taken from the NCI (National Cancer Institute) booklet, What You Need to Know About Breast Cancer.