卵巢囊性腺纤维瘤CT及MRI表现

CT and MRI manifestations of ovarian cystadenofibroma

目的:探讨卵巢囊性腺纤维瘤的CT及MRI表现特点,提高对该病的诊断水平。方法:回顾性分析11例经手术病理证实的卵巢囊性腺纤维瘤患者的CT及MRI资料,其中9例行CT平扫及增强扫描,2例行MRI平扫。结果:本组11例中6例呈囊性,5例呈囊实性。囊性病灶与卵巢囊腺瘤的影像表现无法鉴别。3例囊实性病灶在CT增强后于实性区内可见多发小囊样无强化区,呈"筛孔样"改变。2例囊实性病灶于MRI T2加权呈低信号的实性部分内可见多发小囊样、索条状高信号,形成"黑色海绵征"。结论:"筛孔征"及"黑色海绵征"是卵巢囊性腺纤维瘤的影像特征,有助于其诊断与鉴别诊断。

Objective：To investigate the CT and MRI features of ovarian cystadenofibroma and to improve the diagnostic accuracy.Methods：The CT and MRI materials of 11 cases with surgery and pathology proved ovarian cystadenofibroma were retrospectively analyzed.Of these,9 cases underwent plain and enhanced CT scanning.2 cases had plain MRI.Results：Of the total 11 cases in this study,6 cases had cystic tumor and 5 cases were solid cystic.The images of cystic ovarian cystadenofibroma could not be differentiated from that of ovarian cystadenoma on CT or MRI.On contrast enhanced CT,the solid components of 3 cases with solid cystic tumor showed multiple tiny non-enhanced cystic areas forming ＂sieve sign＂.On T2-weighted MRI of 2 cases with solid-cystic tumor,the solid component showed hypo-intensity,in which hyper-intensed multiple tiny cyst-like and stripe-like components were revealed,forming ＂black sponge sign＂.Conclusion：＂Sieve sign＂ and ＂black sponge sign＂ were the characteristic imaging features of ovarian cystadenofibroma,which might be helpful for the diagnosis and differential diagnosis.