35 Singapore Journal of Obstetrics and Gynaecology March 2002; 33(1): 35-39 non-gynaecological origin. Differential diagnosis of abnormal mass includes functional cysts, neoplastic cysts, tubo-ovarian abscesses, hydro salpinx, ectopic pregnancies, malignant ovarian tumors, paraovarian cysts, tubal malignancy, broad ligament cyst, fimbrial cysts, sigmoid colon or colon distended with gases or faeces, pelvic kidney and pregnancy in bicornuate uerus etc. An adnexal mass may be benign or malignant; it is the risk of malignancy that propels us for early, accurate and prompt diagnosis to lessen the mortality and morbidity. An adnexal mass often involves ovary, because of the propensity of the ovary for neoplasia, fewer neoplasms occur in the fallopian tube, it is commonly involved in inflammatory process. With the development of sonography including Doppler study we are able to make early and more specific pre- and intra-operative evaluation of adnexal mass and to develop individual strategies of adnexal mass to avoid unnecessary interventions. Color Doppler study increases the diagnostic accuracy of plain sonography. The measurement of vascular resistance with Doppler is an important complement 1 Department of Obstetrics & Gynaecology 2 Department of Radiology 3 Department of Pathology Institute of Medical Sciences, Banaras Hindu University, Varanasi-221005, India. Correspondance: Dr. Anuradha Khanna Department of Obstetrics & Gynaecology’ Institute of Medical Sciences, Banaras Hindu University, Varanasi-221005, India. Color Doppler study for differentiation of various adnexal masses Anuradha Khanna 1 Shweta Garg 1 R C Shukla 2 Mohan Kumar 3 ABSTRACT Aim: To evaluate the color Doppler studies to differentiate between the benign and malignant adnexal masses. Material & Methods: One Hundred and sixty five women with adnexal masses underwent Doppler Color sonography and Pulsality index, Peak systolic velocity, distribution of vascularity and dicrotic notch was examined and assessed for their significance. Results: Of the 138 benign cases, color Doppler study could diagnose 136 cases as benign but labeled two cases as malignant which were actually benign. Out of 27 malignant cases, all 27 cases were diagnosed as malignant by color Doppler study. Our study showed sensitivity 100%, specificity 93.1%, positive predictive value 98.5% and negative predictive value 100% of color Doppler. Conslusions: Color Doppler study is helpful in differentiating benign from malignant adnexal masses. Key Words: Cancer, Malignancy, Benign, Ovary, Ultrasonography, Color, Adnexa, Systolic, Frequency INTRODUCTION Adnexal mass is a common presentation in office visit to a general gynaecologist. Adnexa consist of fallopian tubes, ovaries, broad ligament, and structures within broad ligament that are developed from the embryonic nests. Differential diagnosis of adnexal mass is complex. Adnexal mass may be of gynaecological or NI (3.02)-k175 4/12/02, 10:43 AM 35