[Radiation therapy of T1N0M0 glottic carcinoma: clinical evaluations based on field size, plastic shell and wedge...

One hundred forty previously untreated cases of T1N0M0 glottic carcinoma underwent therapy at our department from November 1977 through May 1984. Ninety-six of them were treated with the open-field technique of 4 MVX-ray using parallel opposed fields in bandage up to April 1982 (group I). The remaining 44 cases were treated with the wedge-filtered technique in a plastic shell in order to improve the dose distribution and immobilization during radiotherapy starting in May 1982 (group II). The two-year disease-free survival rates were 85% and 91%, respectively. Thus, better results were achieved by improved treatment techniques.