NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,847 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.

definitive treatment
(deh-FIH-nih-tiv TREET-ment)
The treatment plan for a disease or disorder that has been chosen as the best one for a patient after all other choices have been considered.