![]() ![]() The main factor involved in the onset of OOSCC is smoking ( 6), but the incidence of OOSCC has also been shown to be associated with human papillomavirus (HPV). On average, patients diagnosed with OOSCC survive for 5 years ( 5). Affected regions include the lips, buccal mucosa, gums, hard palate, tongue, oral floor, tonsils, soft palate, tongue base, salivary glands, retromolar trigone, vallecula, tonsillar arches, palatine tonsils and the posterior and lateral walls of the oropharynx ( 4). ![]() In Brazil, the Latin American country with the highest prevalence of OOSCC, it is currently the seventh-most common type of cancer ( 2).Īpproximately 90% of neoplasms affecting the oral cavity and oropharynx are squamous cell carcinomas ( 3). Oral cancer is the sixth-most common type of cancer in the world. Oral cavity and oropharynx squamous cell carcinoma (OOSCC) have become a major health concern among public health authorities worldwide due to its high incidence, prevalence and mortality ( 1). ![]()
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