Abstract
1. Sixty-two cases of tumor of the tongue treated in ENT department of medical school during 1962-1971 were classified into 4 groups depending upon the location and size of tumor.(A) less than 1.5 cm and limited to the margin of tongue.(B) more than 1.5cm and limited to the tongue.(C) extending to floor of the mouth.(D) located on the pharyngeal tongue.
2. Survival rate over 2 years in A group was about 77%, but in B, C, D groups was under 20%.
3. The clinical factors influencing on prognosis of cancer of the tongue were the size and location of primary tumor and the presence of cervical metastasis.
4. It was suggested that prophylactic neck dissection in the cases of B, C, D groups were neccessary to obtain the better survival rate.
5. Neck dissection should be done under the complete control of primary tumors.
