Findings on sonography diagnostic potential to be used in screening for endometrial carcinoma suggested an ultrasound examination of 235 postmenopausal patients who had had no relevant complaints. As a result, criteria of ultrasound screening for endometrial tumors in postmenopausal patients were worked out. Later, sonography was carried out in 596 endometrial carcinoma patients with a view to verify the diagnosis. It pointed to inadequate identification of microinvasive carcinoma (up to 5 mm) by transabdominal and transvaginal scanning. Sonography, however, efficiently diagnosed marked infiltration (9.4%), organ involvement (88.4%) and metastatic lesions in the ovaries.