Oral communication abstractsConclusions: On ultrasound GCT is characterized by a large multilocular or solid mass with a large number of locules and increased vascularization; it rarely has papillarities.
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Mayo Clinic, United StatesObjectives: Ovarian causes of virilization include polycystic ovary syndrome (PCOS), androgen-secreting neoplasms and ovarian stromal hyperthecosis (SH). The ultrasound features of the first two causes have been described, but there is little published data regarding the ultrasound appearance of ovarian stromal hyperthecosis. The primary purpose of this study was to describe the sonographic features of ovarian SH. Methods: A computerized search of our institution's pathology and imaging databases from 1996 to 2006 was performed to identify patients with histologically proven SH who had a pelvic ultrasound scan before surgery. The ultrasound images were reviewed to categorize the ultrasound findings. Associated pathological findings in the ovaries and uterus were also noted. Results: Sixteen ovaries with SH, in 12 patients with mean age 59.6 (range, 36-83) years, were identified. SH was bilateral in four, unilateral in six and of uncertain laterality in two patients who only had a unilateral oophorectomy. Ultrasound findings in the 16 ovaries with SH were: two normal, seven not seen, three enlarged but otherwise normal, one with a hemorrhagic cyst (resolved by surgery) and otherwise normal, one with a probable solid mass (nodular SH), and two with polycystic ovaries (both SH and PCOS by histology). Three of the 12 patients (25%) also had endometrial carcinoma. Five of the 12 patients (42%) also had an ovarian fibrothecoma. Conclusions: Ovarian SH does not have recognizable ultrasound findings in most patients. A minority of affected ovaries appear enlarged but otherwise normal, a solid mass may infrequently be visible, and PCOS changes may coexist with SH. A possible association of SH with endometrial carcinoma was noted, and has been reported previously. A possible association of SH with fibrothecoma was also noted, which to our knowledge has not been reported previously. Objectives: To assess the performance of the power Doppler index (PDI) compared to subjective judgment of the ultrasonographer in the preoperative diagnosis of ovarian malignancy. Methods: Eighty-two successive complex adnexal masses were examined prospectively with power Doppler before surgical treatment. The investigation was multicentric and included in a large contrast-enhanced ultrasound European study. A vascularity index based on the number of colored pixels, was estimated on selected frames (defined region of interest covering the entire tumor) of the tumors using an in-house color quantifying program. The sensitivity and specificity of PDI, the resistance index and subjective visual scoring were compared using receiver-operating characteristic (ROC) curves. Results: Histology identified 34 malignant tumors including 11 borderline tumors and 48 benign tumors. PDI was considerably higher in malignant tha...