Preoperative ultrasound assessment of adnexal masses in premenopausal women

Objectives: This study was undertaken to determine the accuracy of preopera tive transvaginal ultrasound in predicting ovarian histopathology in premen opausal women. Methods: A retrospective cohort study was performed from rep roductive-age women that underwent removal of an ovarian cyst between May 1 990 and April 1998. Results: Of the 120 consecutive patients identified, 19 did not meet inclusion criteria. Pathologic diagnosis confirmed endometrio mas (n = 55), mature teratoma (n = 25), serous cystadenoma (n = 18), persis tent corpus luteum (n = 7) and other (n = 5). The primary preoperative tran svaginal ultrasound impression was accurate in most cases (endometrioma: 85 %, mature teratoma: 86%, serous cystadenoma: 80%). Conclusion: Endometrioma s and mature cystic teratomas can be predicted with a moderate degree of ac curacy by preoperative ultrasound. (C) 1999 International Federation of Gyn ecology and Obstetrics.