NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,899 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

bilateral prophylactic mastectomy
(by-LA-teh-rul PROH-fih-LAK-tik ma-STEK-toh-mee)
Surgery to remove both breasts in order to reduce the risk of developing breast cancer.