A French Cooperative study of 1383 cases with invasive carcinoma of the intact uterine cervix treated with radiation therapy alone, using the guidelines provided by G. H. Fletcher led to the following conclusions: The techniques of treatment were easily reproducible in 9 French centers, working in a prospective cooperative study; Results similar to those of the original study were achieved in Stages I and IIA (MDAH substaging) with a locoregional failure rate of 7%; In Stage IIB, the locoregional failure rate of 16% is also comparable in both studies; Locoregional failures in Stage III are slightly lower than those reported in Houston, probably reflecting differences in patient's prognostic factors in France and Texas; The 5-year survival rate obtained in advanced Stages (UICC FIGO staging) are among the highest in the literature (76% in Stage IIb, 62% in Stage IIIa and 50% in Stage IIIb); The rate of severe complications remains acceptable and decreased throughout the study thanks to a better use of computer dosimetry.