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Subject Area

Cardiology

Article Type

Original Study

Abstract

Objective To determine whether conventional MRI and diffusion-weighted imaging (DWI) could help accurately in distinguishing benign from malignant adnexal masses. Background Characterization of ovarian lesions is of great importance in order to plan adequate therapeutic procedures. Ovarian neoplasms may be benign, borderline, or malignant. Using an imaging-guided approach based on their morphological appearance, we classified adnexal masses into three main groups: cystic, solid and complex cystic and solid. We also used DWI as an advanced magnetic resonance technique to achieve more accuracy of diagnosis. Materials and methods Thirty patients with initial undetermined ovarian lesions underwent pelvic MRI on 1.5-T magnet with a pelvic-phased array coil. The MRI protocol was done. All cases are operated; their pathological and laparoscopic results were compared with preoperative MRI results. Results In all, 62.5% of malignant cases are complex (cystic/solid); 95% of benign cases have no vegetations or papillary projections; 85.7% of heterogeneously enhanced lesions were malignant 62.6% of malignant cases show septations. Sensitivity, specificity, positive predictive value, negative predictive value and accuracy of conventional MRI have increased from 87.5, 86.4, 70, 95, 86.7%, respectively, for conventional MRI to 100, 93.3, 88.9, 100, 95%, respectively, for DWI. Conclusion MRI is an accurate modality for the differentiation of benign and malignant adnexal masses, especially with diffusion MRI which gives more accuracy.

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