NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,790 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.

fat necrosis
(… neh-KROH-sis)
A benign condition in which fat tissue in the breast or other organs is damaged by injury, surgery, or radiation therapy. The fat tissue in the breast may be replaced by a cyst or by scar tissue, which may feel like a round, firm lump. The skin around the lump may look red, bruised or dimpled.