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.

endometriosis
(EN-doh-MEE-tree-OH-sis)
A benign condition in which tissue that looks like endometrial tissue grows in abnormal places in the abdomen.