Abstract
A total of 110 patients with laryngeal cancer treated by radiotherapy during a period of 19 years between 1967 and 1985 were analyzed. Results were as follows;
1) Eighty-three patients (80%) were irradiated curatively with doses given more than 40 Gy and 21 patients (20%) were treated by postoperative irradiation. The mean age was 67.4 and the ratio of men to women was 8.1:1.
2) According to the primary site of laryngeal cancer undergoing a curative irradiation, glottic cancer was 70% (58 patients), supraglottic cancer was 29% (24 patients) and subglottic cancer was 1% (1 patient). As for the stage classification, 22 patients was in stage I, 26 patients in stage II, 20 patients in stage III and 15 patients in stage IV. The rate of early stages (stages I and II) was 72% in glottic cancer, but that of advanced stages (stages III and IV) was 79% in supraglottic cancer.
3) The five-year survival rate of 21 patients who had treated by postoperative irradiation was 37%, and that of 58 patients undergoing a curative irradiation was 32%. The five-year survival rate of curatively irradiated patients with glottic cancer was 84% in stage I, 48% in stage II and 17% in stage III and IV. In all of 21 patients with supraglottic cancer, the five-year survival rate was 15%.
4) Eighteen patients survived more than 5 years; 3 patients were postoperative irradiation and 15 were curative irradiation. In the curative irradiation, 12 patients were glottic cancer, and 3 were supraglottic cancer.
