摘要
目的:探讨卵巢卵泡膜瘤-纤维瘤的MR表现特点。方法:对31例病理证实的卵泡膜瘤-纤维瘤的MRI表现进行回顾性分析,观察肿瘤的形态、大小、边缘和信号特征。结果:31例中卵泡膜瘤7例,纤维卵泡膜瘤15例,纤维瘤9例。全部肿瘤呈圆形或类圆形,边界清楚,肿瘤最大径范围2.1～6.7cm。全部肿瘤T1WI呈等信号或略低信号,卵泡膜瘤T2WI呈高信号;纤维卵泡膜瘤T2WI呈高低混合信号,卵泡膜成分区呈高信号,纤维成分区呈低信号;9例纤维瘤于T2WI呈低信号。31例肿瘤中有1例纤维卵泡膜瘤见小囊变和/或坏死区。增强后卵泡膜成分强化比纤维成分明显,而且纤维成分强化慢于卵泡膜成分。弥散加权成像卵泡膜瘤ADC值(范围1.07～1.32×10-3mm2/s)明显高于纤维瘤(范围0.74～0.49×10-3mm2/s),差异有显著性意义(P<0.01)。结论:卵泡膜瘤-纤维瘤多为实体性肿瘤,T2WI卵泡膜成分呈高信号,纤维成分呈低信号,DWI有助于进一步协助诊断。
Objective：To evaluate MR characteristics of ovarian thecoma-fibromas. Methods：Thirty-one patients with ovarian thecoma-fibromas confirmed by histopathology were reviewed retrospectively. MR findings, including tumor morphology,size,edge and signals were analyzed. Results：Of 31 patients,7 cases were thecomas, 15 were fibrotheeomas and 9 were fibromas. All tumors were round or round -like masses with well-defined margins. The ranges of maximum diameter of masses were 2.1-6.7cm in size. All tumors showed isointensity or slight hypointensity on T：-weighted images; theeomas （n= 7） showed hyperintensity, fibrothecomas （n = 15 ） mixed hyper- and hypointensity, and fibromas （ n = 9 ） hypointensity on T2-weighted images. After injection of contrast medium the theeal elements showed stronger enhancement than the fibroblast areas,and the latter usually had a slower and delayed enhancement than the former. The ADC value （1. 07-1.32× 10^-3 mm^2/s） of thecomas was strikingly higher than that （0.74-0.49× 10^-3 mm^2/s） of fibromas on DWI,indicating a significant difference （P〈0.01）. Conclusion： Thecoma-fibromas are usually solid tumors, the theeal components are hyperintense and the fibroblast elements are hypointense on T2 weighted images, and diffusion-weighted imaging is helpful for further diagnosis.
出处
《放射学实践》
北大核心
2009年第10期1131-1133,共3页
Radiologic Practice
基金
上海市卫生局(2008184)
