脑实质内表皮样囊肿的MRI诊断

目的 总结脑实质内表皮样囊肿的MR影像特征。方法 回顾经手术病理证实为脑实质内表皮样囊肿4例（男3例，女1例），结合文献综合分析脑实质内表皮样囊肿的MR检查方法及影像表现。4例均平扫后增强，辅以FLAIR及DWI（b=1000）序列扫描。结果 4例病灶T1WI上表现为低信号，T1WI上表现为较均匀高信号，FLAIR序列像呈高信号，DWI均匀或欠均匀高信号，增强后病灶不强化或周边轻度强化。结论 脑实质内表皮样囊肿具有较高诊断价值的MR影像特征，MR检查能有效的诊断和鉴别诊断。

MRI diagnosis of intracerebral epidermoid cyst

Objective To summarize the MRI features of intracerebral epidermoid cyst. Methods Four patients(3 males and 1 female) with intracerebral epidermoid cyst,proved by pathology and surgery,were reviewed. MRI examination methods and manifestions of intracerebral epidermoid cyst were analyzed with the literature review. Both plain and enhanced CT were performed in all cases,combining with FLAIR and DWI(b=1000) sequences. Results In four patients,lesions exhibited low signal on T1WI and homogeneous high signal on T2WI. The FLAIR presented the high signal and DWI showed homogeneous or inhomogeneous hyper-intensity signal. The lesions had no enhancement or slight peripheral enhancement after contrast injection. Conclusion MRI of Intracerebral epidermoid cyst has characteristics,which is of great value to the diagnosis and differential diagnosis.