NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,777 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.

ecchymosis
(EH-kih-MOH-sis)
A small bruise caused by blood leaking from broken blood vessels into the tissues of the skin or mucous membranes.