Objective: The purpose of this study was to compare 2- dimensional and 3- dimensional power- Doppler imaging diagnostic performance for the prediction of ovarian cancer in complex adnexal masses. Study design: Sixty- nine complex adnexal masses in 60 women (mean age, 48.4 years [range, 17- 82 years]) were evaluated by 2- dimensional and 3- dimensional power- Doppler imaging for differentiating benign from malignant masses. Complex adnexal mass was defined in the presence of at least 1 of the following features: solid areas, thick papillary projections, thick septa, or purely solid echogenicity. One examiner performed 2- dimensional power- Doppler imaging, and a second examiner performed 3- dimensional power- Doppler imaging. All masses were removed surgically, and definitive diagnosis was obtained. Sensitivity, specificity, positive predictive value, negative predictive value, and accuracy were calculated for both techniques. Results: Forty- five tumors (65.2% ) were proved to be malignant, and 24 tumors (34.8% ) were proved to be benign. Sensitivity, specificity, positive predictive value, negative predictive value, and accuracy for 2- dimensional power- Doppler imaging were 97.8% , 87.5% , 93.6% , 95.5% , and 94.2% , respectively. Sensitivity, specificity, positive predictive value, negative predictive value, and accuracy for 3- dimensional power- Doppler imaging were 97.8% , 79.2% , 89.9% , 95% , and 91.3 % respectively. There were no statistical differences in sensitivity and specificity (McNemar test: P =. 250) Conclusion: Three- dimensional power- Doppler imaging did not have a better diagnostic performance than 2- dimensional power- Doppler imaging for the discrimination of benign from malignant complex adnexal masses.
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