卵巢卵泡膜细胞瘤的MRI和CT表现与病理分析

MRI and CT findings and pathological analysis of ovarian thecoma

目的分析卵巢卵泡膜细胞瘤的CT及MRI表现特征,与病理结果对照,提高其影像学的诊断水平。方法回顾分析32例经手术病理证实为卵泡膜细胞瘤患者的CT或MRI表现特征,并结合临床与病理对照。结果双侧同时发病1例,31例为单侧发病,圆形或椭圆形,大小不等,长径0.3~28.4cm,以实性为主,CT扫描实性部分或囊壁平扫以等低混杂密度为多,MRI平扫实性部分T1WI呈低信号,部分病灶信号欠均匀,T2WI信号欠均匀,可呈高信号、稍低信号、高低混杂信号等,T2WI脂肪抑制序列示11例瘤内极低信号结节;增强扫描实性部分呈渐进性轻-中度强化,9例病灶内见较多明显强化的纤细血管影;3例可见“荷包蛋”征。结论卵泡膜细胞瘤的影像学表现具有特征性,有助于术前及鉴别诊断。

Objective To analyze CT and MRI findings of ovarian thecoma and to compare with the pathological trait. Methods CT and MRI findings of ovarian thecomas in 32 cases proved by surgery and pathology were analyzed retrospectively. Results One case was bilateral,and 31 cases was singe. All nearly round or elliptic.The size of the tumors ranged from 0.3 cm to 28.4 cm, with mainly solid. The solid part or cystic wall were equivalent and low hybrid density on unenhanced CT. The rumors exhibited isointensity and hypointensity on T1WI,heterogeneous signal on T2WI. Eleven cases showed low signal nodules in the tumor on T2WI-SPAIR. After contrast injection,the solid part of tumors demonstrated mild to moderate enhancement and delayed slight progressive enhancement. Nine cases showed more obvious enhancement of fine vascular shadows. Three cases showed "pocket egg" sign. Conclusion The imaging features of thecoma are helpful in preoperative diagnosis and differential diagnosis.