颅内表皮样囊肿的影像与病理所见对照分析

目的探讨颅内表皮样囊肿的常见及特殊影像表现与病理所见的关系。资料与方法回顾性分析44例表皮样囊肿的临床资料和影像学表现。全组病例均行MRI扫描，其中3例行扩散加权成像(DWI)检查，20例有CT平扫资料，1例在MRI检查的同时行X线颅骨平片检查。结果病变位于桥小脑角及桥池者24例，桥池及鞍上池者5例，鞍旁5例，大脑纵裂2例，第四脑室2例，板障2例，前颅凹2例，松果体区1例，内听道及中耳1例。其中6例影像学表现特殊，与病理检查对照，发现囊内含较多蛋白、脂类物质、胆固醇结晶以及发生囊内出血、钙化。液体衰减反转恢复序列(FLAIR)像和DWI能清楚显示位于基底池内的表皮样囊肿，并能与蛛网膜囊肿相鉴别。结论FLAIR和DWI是诊断颅内表皮样囊肿非常有价值的检查方法。

Correlation of the Imaging Findings of Intracranial Epidermoid Cyst with the Pathology

Objective To investigate the correlation of the general and special imaging features of intracranial epidermoid cyst with their pathological findings. Materials and Methods The clinical materials and the imaging findings of 44 cases of epidermoid cyst were analysed retrospectively. 44 cases were examined with MR, 3 with diffusion weight imaging, 20 with CT, and 1 with radiography.Results The locations of lesions of 24 cases were found in cerebellopontine angle and pontine cisten, 5 cases in pontine cisten and suprasellar cisten, 5 cases in parasellar region, 2 cases in intercerebral fissure, 2 cases in the fourth ventricle, 2 cases in diploe, 2 cases in anterior cranial fossa, 1 case in pineal region, 1 case in the internal auditory canal and middle ear. Special imaging findings of 6 cases were result from containing more proteinaceous contents, sebaceous materials, cholesterol cystals, with hemorrhage and calcium in the cyst. Epidermoid cyst in the basal cistern can be clearly seen in FLAIR and DWI and differented from arachnoid cyst.Conclusion FLAIR and DWI are valuable methods in diagnosis of intracranial epidermoid cyst.