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The Sidney Kimmel Comprehensive Cancer Center

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Lip and Oral Cavity Cancer

A disease in which cancerous cells are found in the tissues of the lip or mouth. The oral cavity includes the front two-thirds of the tongue, the upper and lower gums, the lining of the inside of the cheeks and lips, the floor of the mouth under the tongue, the bony top of the mouth (hard palate), and the small area behind the wisdom teeth.