The NCI Dictionary of Cancer Terms features 7,800 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.
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Refers to the mouth. It includes the lips, the lining inside the cheeks and lips, the front two thirds of the tongue, the upper and lower gums, the floor of the mouth under the tongue, the bony roof of the mouth, and the small area behind the wisdom teeth.