Cancerous growth occurring within the structures of the oral cavity is known as Oral Cancer The oral cavity includes the mouth and all the structures within it, such as the tongue, teeth, gums, lower jaw etc.

Cancer is an abnormal disorganized growth of cells in the tissue of a person. Cancer cells keep on multiplying without paying head to the body's command to stop. This abnormal growth of cells destroys the normal structure and the function of the affected tissue and the body in general. Among other cancers oral cancer is one of the most common causes of death. In male, oral cancer represents 4% of total body cancer and in female; it is 2% of all cancers. Majority of the oral cancers affect the outer layer of mucous membrane covering the oral cavity.