Oral cancer is a subtype of head and neck cancer is any cancerous tissue growth located in the oral cavity. [1] There may be a primary lesion originating in one of the oral tissues, by metastasis from a distant site of origin, or the extension of a neighboring anatomic structure, such as the nasal cavity and mouth cancer may come from a tissue of the mouth, and can be varied histologic types: teratoma, lymphoma, adenocarcinoma of the salivary gland more or less, from tonsillar lymphoid tissue or other, or melanoma from the pigment-producing cells the oral mucosa. There are several types of cancers of the mouth, but about 90% are squamous cell carcinomas, [2] from the tissues of the mouth and lips. The oral or mouth cancer most often affects the tongue. You can also occur on the floor of the mouth, cheek lining, gingiva (gums), lips, or palate (roof of mouth).
Most oral cancers are very similar under the microscope and are called squamous cell carcinoma. These are malignant and tend to spread rapidly.
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