Cervical biopsies in all patients and conizations in selected patients are indicated before irradiation and surgical therapy to detect spread of endometrial cancer to the cervix. Cervical biopsies disclosed endometrial cancer in 1.5% of patients. Conizations in certain selected high-risk patients whose cervical biopsies were negative, disclosed an additional 2.2% patients with cervical involvement. Since therapy to improve survival of patients in whom endometrial carcinoma has extended to the cervix must be radically applied, the gynecologist must exclude the presence of such cervical spread before embarking on more conventional treatment.