BACKGROUNDThe aim of the study is:1. To evaluate the use of risk of malignancy index in primary evaluation of patients with adnexal masses. 2. To differentiate a benign from malignant ovarian masses, which is a key feature in clinical management and surgical planning in such patients. 3. To correlate histopathologically after surgery and to compare the efficacy of RMI in evaluating adnexal masses. MATERIALS AND METHODSThis longitudinal prospective study was conducted on 100 women with suspected pelvic mass fitting into the inclusion criteria in the Department of Obstetrics and Gynaecology at Government General Hospital, Rangaraya Medical College, Kakinada, from 2014 to 2016. RESULTS AND CONCLUSIONSOut of 100 women in the study in total, 18 were diagnosed as malignant. RMI was >200 in 26 patients. Out of them, 14 are malignant. 4 members in moderate risk are malignant. Preoperative diagnosis is crucial and remains a challenging issue for gynaecologists. RMI alone is better predictor than separately from menopause status, ultrasound score and CA125 level.

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