卵巢性索间质肿瘤的影像诊断

Imaging diagnosis of specific gonadal sex cord stromal tumor of ovary

目的探讨卵巢性索间质肿瘤的影像诊断价值。方法回顾分析经手术、病理证实的17例卵巢性索间质肿瘤的影像资料并进行分析。结果肿瘤均为单发,边界清楚,密度不均,10例卵泡膜细胞瘤表现为肿瘤信号不均,T2WI呈低信号为主,动态增强后病灶延迟强化。4例颗粒细胞瘤表现为实性肿块内多发囊变,囊间有分隔,多数分隔较厚,动态增强后瘤内实性成分有强化。2例支持间质细胞瘤表现为肿瘤内有多发小囊,动态增强后病灶明显强化。1例硬化性间质瘤表现为肿块边缘明显强化,周边并可见粗大血管。结论卵巢性索间质肿瘤有特征性CT及MR影像表现,且多无恶性病变所示的周围浸润,结合内分泌异常者有助于诊断。

Objective To assess the imaging diagnosis of ovarian gonadal sex cord stromal tumor.Methods The imaging findings in 17 cases of pathologically proved ovarian granulosa cell tumor were retrospectively analyzed.Results All tumors were single in lesion with clear boundary and homogenous density.In ten thecoma,the mass appeared as a homogeneous solid tumor with dark signal intensity on T2-weighted MRI and with delayed enhancement on CT.In four ovarian granulosa cell tumor,the lesion presented as mixed cystic-solid mass,the inner cystic wall was smooth,the cysts were separated by thick septa;after contrast administration marked enhancement of solid components in tumor was revealed.Two sertoli-leydig cell tumors appeared as well-defined,enhancing solid mass with variable-sized intratumoral cysts.One sclerosing stromal tumor showed typical early peripheral enhancement with centripetal progression.Conclusion Imaging findings in combination with clinical features can improve the accuracy rate in diagnosis of ovarian gonadal sex cord stromal tumor.