Three‐Dimensional Sonographic Morphologic Assessment of Adnexal Masses

Objective The purpose of this study was to assess the reproducibility of 3‐dimensional (3D) sonography for classifying adnexal masses. Methods Eighty‐two consecutive women with the diagnosis of an adnexal mass on 2‐dimensional transvaginal sonography were reevaluated by 3D sonography, and 3D volume data from each mass were stored. Two different examiners (6 years and 1 year of experience in 3D sonography, respectively) reviewed 3D sonograms 1 month after the last patient was recruited and then 1 week later again. Masses had to be classified as benign or malignant. Criteria suggestive of malignancy were the presence of a thick wall, gross papillary projections, solid areas, and solid echogenicity. A definitive histologic diagnosis was obtained in every case. Intraobserver and interobserver agreement was estimated by calculating the Cohen κ index. Results Twenty‐seven (33%) tumors were malignant, and 55 (67%) were benign. Intraobserver agreement for both examiners was good (κ = 0.78 and 0.72, respectively). Interobserver agreement was also good (κ = 0.70). Conclusions Three‐dimensional sonography is a reproducible technique for morphologic assessment of adnexal masses.