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J Korean Soc Ther Radiol. 1987 Dec;5(2):105-110. English. Original Article.
Ryu S , Lee CG , Park IK , Suh CO , Kim GE , Loh JJ .
Department of Radiation Oncology, College of Medicine, Yonsei University, Yonsei Cancer Center, Korea.
Department of Therapeutic Radiology, Kyungpook National University Hospital, Korea.

Fourty nine patients with squamous cell carcinoma of oral tongue were reviewed retrospectively for the evaluation of clinical manifestation and for the comparison between therapeutic modalites. The gross shape of the tumor was infiltrative in 22, ulcerative in 12, and ulceroinfiltrative type in 10 patients. Direct extension of the tumor was most commonly to the floor of the mouth. The incidence of nodal metastasis generally increased with tumor stage. 55% of the patients showed neck nodal metastasis at the time of diagnosis. Ipsilateral subdigastric node were most commonly involved, followed by submandibular nodes. The 5-year survival rate of patients treated with surgery and radiotherapy was 58.7% in contrast to 21.6% in radiation alone group. Overall 5-year survival rate was 31%. In radiation alone group, half of the patients in stage I, II were locally controlled. But the local control in stage III, IV was much inferior to early lesions. Especially, of 4 patients combined with implantation tecnhnique, 3 were completely controlled. 5-year survival rate of these implanted patients was 50%, 49.4% of patients treated over 7,000 cGy survived 5 years. This was significant in contrast to 6.4% of the group treated below 7,000 cGy. The most common sites of failures were primary sites. In early lesions primary radiotherapy with implantation would be an appropriate treatment in cancer of oral tongue, operation reserved for radiation failure. Operation and adjuvant radiotherapy is recommended in cases of advanced disease.

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