Cancer may be regarded as a group of diseases characterized by an abnormal growth of cells, an ability to invade adjacent tissue and even distant organs, and the eventual death of the affected patient if the tumor has progressed beyond that stage when it can be successfully removed. Cancer can occur at any site or tissue of the body and may involve any type of cells.

In 1995, the south East Asia Region of WHO found that a great majority of cancers of the oral cavity occur in India. These and other international variations in the pattern of oral cancer are attributed to multiple...