From 1951 to 1972, a total of 631 cases of invasive carcinoma of the cervix were diagnosed in Frederiksberg, Copenhagen, Denmark. Treatment was either by surgery or radiotherapy, a combination of both being rarely used. The crude five-year survival rates were 99 per cent in stage Ia, 79 per cent in stage Ib, 67 per cent in stage IIa, 45 per cent in stage IIb, 23 per cent in stage III, 5 per cent in stage IV and 63 per cent for all stages. The relative survival rates were respectively 100 per cent, 81 per cent, 73 per cent, 48 per cent, 26 per cent, 5 per cent and 66 per cent. Radical hysterectomy were found more effective than radiotherapy in stage Ib carcinoma of the cervix. This difference was not explained by age but other factors possibly playing a role are considered. The combination of surgery and radiotherapy is discussed and only seems indicated for patients with stage Ib carcinoma and lymph node metastases.