颅内表皮样囊肿破裂的MRI诊断

摘要

目的:探讨颅内表皮样囊肿破裂的MRI表现特征.方法:回顾性分析4例经手术病理证实的颅内表皮样囊肿破裂的MRI表现.结果:4例颅内表皮样囊肿均呈混杂T1、混杂T2信号,FLAIR呈混杂信号,DWI呈高信号,增强扫描未见强化.破裂的脂滴均位于蛛网膜下腔内,3例位于脑室内,脂滴均呈短T1、长T2信号,FLAIR呈低信号,DWI上呈低信号,增强扫描均未见强化.其中2例脑室内可见脂肪-脑脊液平面.结论:颅内表皮样囊肿破裂具有特征性MRI表现,MRI对本病的诊断及鉴别诊断具有重要意义.%Objective:To investigate the MRI characteristics of the ruptured intracranial epidermoid cyst. Methods: The MRI findings of 4 patients with surgery and pathology proved ruptured intracranial epidermoid cyst were retrospective ly analyzed. Results:4 cases of intracranial epidermoid cyst showed mixed signal intensities on T1 WI,T2 WI and FLAIR,and hyperintensity on DWI. No enhancement was assessed after contrast enhancement. Lipid droplets from the ruptured in tracranial epidermoid cyst could be revealed within cerebral subarachnoid space (4 cases) ,within ventricles (3 cases). Lipid droplets were hypertensity on T1WI and T2 WI, hypotensity on FLAIR and DWI,with no enhancement. Fat cerebrospinal fluid level within ventricles could be seen in 2 cases. Conclusion Characteristic MRI features for the diagnosis of ruptured in tracranial epidermoid cyst could be assessed,which are important for the diagnosis and differential diagnosis of this disease.