摘要：Objective: The purpose of this study was to compare 2- dimensional and 3- dimensional power- Doppler imag.ng.diag.ostic performance for the prediction of ovarian cancer in complex adnexal masses. Study desig.: Sixty- nine complex adnexal masses in 60 women (mean ag., 48.4 years [rang., 17- 82 years]) were evaluated by 2- dimensional and 3- dimensional power- Doppler imag.ng.for differentiating.benig. from malig.ant 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 echog.nicity. One examiner performed 2- dimensional power- Doppler imag.ng. and a second examiner performed 3- dimensional power- Doppler imag.ng. All masses were removed surg.cally, and definitive diag.osis was obtained. Sensitivity, specificity, positive predictive value, neg.tive predictive value, and accuracy were calculated for both techniques. Results: Forty- five tumors (65.2% ) were proved to be malig.ant, and 24 tumors (34.8% ) were proved to be benig.. Sensitivity, specificity, positive predictive value, neg.tive predictive value, and accuracy for 2- dimensional power- Doppler imag.ng.were 97.8% , 87.5% , 93.6% , 95.5% , and 94.2% , respectively. Sensitivity, specificity, positive predictive value, neg.tive predictive value, and accuracy for 3- dimensional power- Doppler imag.ng.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 imag.ng.did not have a better diag.ostic performance than 2- dimensional power- Doppler imag.ng.for the discrimination of benig. from malig.ant complex adnexal masses.