NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,812 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.

healthy control
(HEL-thee kun-TROLE)
In a clinical study, a person who does not have the disorder or disease being studied. Results from healthy controls are compared to results from the group being studied.