Between October 1961, and November 1978, 31 patients with intraperitoneal metastatic adenocarcinoma of the endometrium were treated by whole-abdomen moving-strip technique and pelvic boost irradiation. In 27 patients, with residual disease less than or equal to 2 cm, the corrected 5-year survival rate was 80%. The absolute 5-year survival rate was 63%. Within this group of 27 patients, the favorable prognostic trends were Stage III, incidental findings, and age less than 50 years. Tumor-reductive surgery to 2 cm or less residual disease was beneficial. Only one patient required operative correction for a complication of radiotherapy. The four patients who had residual disease greater than 2-cm disease died from tumor.