NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,926 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.

A psychologist who diagnoses and treats behavioral and other problems related to the way the brain works. These may include problems with social interactions, ability to control emotions and behaviors, and cognitive abilities (thinking, learning, remembering, and problem solving). These problems may be caused by brain disease, injury, or medical treatment, such as cancer treatment.