In Cambodia and other Asian countries, many people have lesions on the soft parts of their mouth (such as ulcers and red or white patches).  Some of these lesions can progress to become oral cancer.  Oral cancer is one of the 6 most common cancers in Asia (in India, it is the 3rd most common), and studies show that in some countries the number of cases is rising each year.   The most common site for oral cancer is the tongue.  Oral cancer (when advanced) is expensive to treat, can be very disfiguring, leads to permanent impairment, and impacts severely on the patient’s quality of life.  It also has a high mortality rate when diagnosed late.