Oral cancer starts in the mouth, which is also called the oral cavity. The oral cavity includes the lips, inside lining of the lips and cheeks, teeth, gums, the front of the tongue, the floor of the mouth below the tongue, and the bony roof of the mouth. Oral cancer is the 16th most common cancer worldwide. According to Globocan 2020, there were over 375,000 new diagnoses globally. These cancers are more prevalent in men, where 264,000 men were diagnosed vs. 114,000 women. The incidence of oral cancers vary globally, and Papua New Guinea and Sri Lanka had the highest rates, with the United States ranking #30.1
A few risk factors for oral cancer include:2
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