The Clinical Analysis of the Radiation Injury of Carcinoma of the Larynx following High Energy Radiation Therapy

Eighty-seven cases of the larynx which were treated with high energy radiation were followed up 1.5 to 5 year period, radiation injury was classified in four groups.Development of the high energy radiation apparatus produced good results of radiation therapy in stage T1 and T2, but we were not satisfied with the result in stage T3 and T4.More than 50% of stage T3 and T4 groups resulted in radiation injury.To reduce those radiation injury cases, some technical problems in radiation therapy are now under consideration.Many cases of the damaged larynx were suitably treated without surgery.Differential diagnosis between injury and recurrence of the tumor of the larynx is difficult, but it was made correctly by the clinical observations for certain period.