Pathophysiology: Oral cancer or mouth cancer is a type of head and neck cancer, is any cancerous tissue growth located in the oral cavity.It may arise as a primary lesion originating in any of the tissues in the mouth, by metastasis from a distant site of origin, or by extension from a neighboring anatomic structure, such as the nasal cavity.Chewing betel, paan and Areca alcohol containing mouthwashes are known to be a strong risk factors for developing oral cancer.igarette, cigar and pipe smoking are the main forms of tobacco are main causes of Mouth Cancer.
Recent trends in lip cancer incidence in the Swiss Canton of Vaud (approximately 600,000 inhabitants in 1990) were analysed over the period 1975-1990, when a total of 87 cases were registered. A steady and substantial decline was observed in both sexes, since age-standardised (world) rates declined from 1.8 to 0.6/100,000 males and from 0.14 to 0.02/100,000 females.
Researchers will collect the samples of cells from people who had different stages of mouth cancer. They are looking at the genes within the tissues. They are collecting cells from normal mouth tissue as well as from people who have mouth diseases, including mouth cancer.