Sonohysterography, or sonographic uterine cavity visualization by uterine cavity distension, may help to distinguish true endometrial thickening from other intracavitary pathological conditions, assuming the same sonographic appearance. We examined 1.5 women with a thickened endometrium (range 10-25 mm) in sonography performed for postmenopausal bleeding. Sonohysterography revealed a polypoid structure in seven women, a normal uterine cavity in four women, and a thickened endometrium in four women. All the women underwent hysteroscopic evaluation of the uterine cavity. Hysteroscopy confirmed the sonohysterographic findings in 14 women (93.3%). Hysteroscopic resection of the polypoid structure was performed while the other patients underwent diagnostic curettage. Histological examination of the seven polypoid structures revealed benign endometrial polyps in six patients, and one pedunculated submucous fibroid. In the patients undergoing diagnostic curettage, histological examination revealed three cases of glandular hyperplasia, one of cystic (atrophic) hyperplasia, and one of papillary endometrial adenocarcinoma. Two cases were inadequate for diagnosis. The advantage of sonohysterography in distinguishing endometrial thickening from intracavitary polyps or fibroids was clearly demonstrated. This technique can help in tailoring the correct treatment in various conditions presenting as postmenopausal bleeding.

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