A prospective controlled study was undertaken for the purpose of establishing the usefulness of postoperative radiotherapy following radical surgery of cervical carcinoma, Stage pT1b NO MO. A random selection was made of 120 patients who were either treated exclusively by radical surgery (Wertheim-Meigs) or in whom radical surgery was followed by postoperative telecobalt irradiation of the minor pelvis 50 to 52 Gy). No significantly difference were found to exist between the two therapeutic approaches, after an average period of follow-up observations of 33 months (between twelve and 60 months). The incidence of lymphoedema was increased with significance in those patients who had been irradiated.