NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,922 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.

mental health counselor
(MEN-tul helth KOWN-seh-ler)
A specialist who talks to patients and their families about emotional and personal matters, and can help them make decisions. Also called counselor.