目的 分析桥小脑角表皮样囊肿 的磁共振成像(MRI)表现，探讨磁共振 (MR)扫描技术在桥小脑角表皮样囊肿诊断 中的价值。方法 回顾性分析12例桥小脑 角表皮样囊肿的MR扫描技术及MRI表现。 结果 12例中1例T1WI呈高信号，其余T1WI 呈低信号。所有病例T2WI 均呈高信号， 稍高于脑脊液。9例FLAIR 囊内见不同数 量的絮状稍高信号影，其中有2 例仅在边 缘出现少量絮状等高信号影。DWI 均表现 为明显高信号，信号不均匀。结论 桥小 脑角表皮样囊肿MRI 表现具有特征性， MRI对本病的诊断与鉴别诊断具有价值， 联合应用DWI和T2 FLAIR有利于桥小脑角 皮样囊肿的诊断。

Objective To analyze the MR imaging manifestations of cerebellopontine angle epidermoid cysts and evaluate the value of MR scanning technique in the diagnosis of cerebellopontine angle epidermoid cysts. Methods The MR scanning technique and MRI findings of 12 cases of cerebellopontine angle epidermoid cysts were analysed retrospectively. Results On T1WI, 1 case show hyperintense and other cases showed hypointense in the mass. All of the cases showed hyperintense on T2WI, which were a little higher than cerebrospinal fluid. On T2 FLAIR, 9 cases displayed hyperintense among which only 2 cases appeared as hyperintensity on the margin. All of them were hyperintensity on DWI, homogeneous or heterogeneous. Conclusion Cerebellopontine angle epidermoid cysts has characteristic MRI feature and MRI is a valuable method for the diagnosis and differential diagnosis of it. Combined with the application of DWI and T2 FLAIR will be helpful to diagnosis of cerebellopontine angle epidermoid cysts.