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OC154: Accuracy of transvaginal ultrasound examination for assigning a specific diagnosis to adnexal masses

infiltrating adenomysosis. Pathological reports of surgically removed uteri and/or at magnetic resonance imaging (MRI) reports were considered the gold standard. Demographic and sonographic data were recorded. Results: Median age was 44 (IR, 40–48) years. Seven patients underwent MRI because of concomitant ovarian and deep infiltrating endometriosis. Seventeen patients underwent hysterectomy for final surgical treatment of symptoms. Pathological and MRI reports confirmed deep uterine adenomyosis in all patients. Diffuse, anterior and posterior deep uterine adenomyosis was observed in 13 (54%), six (25%) and five (21%) patients, respectively. Conclusions: The diagnosis of deep uterine adenomyosis at 3D-TVS by VCI analysis was correct in all cases. This was probably due to the enhancement of tissue echogenic pattern by adding up the highresolution information from single ultrathin sonographic planes into 2-mm slices. These preliminary results, if confirmed in a larger study, could define 3D-TVS VCI as a possible standard for the diagnosis of deep uterine adenomyosis.