NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,779 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.

Cowden syndrome
(KOW-den SIN-drome)
An inherited disorder marked by the formation of many noncancerous growths called hamartomas. These growths occur in the skin, breast, thyroid, colon, intestines, and inside of the mouth. Patients with Cowden syndrome are at increased risk of certain types of cancer, including breast and thyroid. Also called Cowden disease and multiple hamartoma syndrome.