NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,791 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.

positive test result
(PAH-zih-tiv ... reh-ZULT)
A test result that shows that a person has the disease, condition, or biomarker for which the test is being done. A positive test result usually means that the test result is not normal. More testing may be needed to make a diagnosis or to make sure a positive test result is correct.