NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,863 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.

fibrocystic breast changes
(FY-broh-SIS-tik brest CHAYN-jiz)
A common condition marked by benign (not cancer) changes in breast tissue. These changes may include irregular lumps or cysts, breast swelling or discomfort, sensitive nipples, and itching. These symptoms may change throughout the menstrual cycle and usually stop after menopause. Fibrocystic breast changes can occur at any age, but are most common in younger women. This condition does not increase the risk of breast cancer.