桥小脑角区胆脂瘤的磁共振诊断价值

目的：探讨磁共振扩散加权成像（DWI）对颅内桥小脑角区胆脂瘤的诊断价值。方法：回顾性分析我院14例经手术和病理证实的桥小脑角区胆脂瘤患者的常规磁共振和DWI图像的特征。结果：所有病变均以累及桥小脑角为主,病灶为类圆形或不规则形,沿蛛网膜下腔生长,6例包埋基底动脉。平扫9例以与脑脊液一致的长T1、长T2信号为主,5例为混杂信号;病灶无强化及灶周水肿;FLAIR序列10例呈高或稍高信号,边界清楚;DWI典型表现为病灶范围内高信号,病变区与对侧正常脑灰质及脑脊液ADC值的差别有明显统计学意义。结论：桥小脑角区的胆脂瘤在磁共振DWI序列上有特征性表现,DWI序列对桥小脑角区胆脂瘤的诊断和鉴别诊断有重要价值。

Value of MRI on diagnosis of cholestentoma in cerebellopontine angle

Objective:To discuss the value of MR FLAIR and DWI in the diagnosis of cholestentoma in cerebellopontine angle(CPA).Methods:14 patents with cholestentoma proved by surgical and pathological examination were retrospectively reviewed with their data collected from conventional sequences and FLAIR and DWI on MRI.Results:All lesions mainly involved CPA,displaying subround or irregular shapes,running along subarachnoid space.Basilar arteries were encapsulated in 6 lesions.9 cholestentomas that underwent plain sc...