What is the most common malignant tumor in the oral cavity?

Ca tongue -review:sugery-head & neck-cancer of the tongue is the most common malignant tumor in the oral cavity and account for slightly less than one-third of the malignancies in the area. about two thirds of cases present as early lesions in the mobile anterior portion of the tongue. most workers in the field agree that for these stage i and stage ii lesions, surgery and irradiation give equivalent result (45% 5-year survival), and the treatment should therefore be tailored to the patient. failures are almost always due to supraclavicular recurrence and many recommend excision of the radiation scar and prophylactic irradiation of the neck nodes, particularly in the stage ii and stage iv tumors in the base of the tongue, which have a poorer prognosis