颅内表皮样肿瘤的扩散加权磁共振成像

Diffusion-weighted magnetic resonance imaging of intracranial epidermoid tumours.

作者信息

Laing A D, Mitchell P J, Wallace D

机构信息

University of Melbourne, Department of Radiology, Royal Melbourne Hospital, Parkville, Victoria, Australia.

出版信息

Australas Radiol. 1999 Feb;43(1):16-9. doi: 10.1046/j.1440-1673.1999.00619.x.

DOI:10.1046/j.1440-1673.1999.00619.x

PMID:10901864

Abstract

Intracranial epidermoids can closely mimic cerebrospinal fluid (CSF) on MRI and CT. Therefore epidermoids can be difficult to detect, or distinguish from CSF. Three cases of intracranial epidermoid are presented, one of which closely mimicked an arachnoid cyst on CT and routine MRI sequences. Diffusion-weighted magnetic resonance imaging (DWI) was performed. All three epidermoids demonstrated marked restriction of diffusion relative to CSF, clearly defining the extent of each lesion, and allowing differentiation from an arachnoid cyst or an enlarged CSF space.

摘要

颅内表皮样囊肿在磁共振成像（MRI）和计算机断层扫描（CT）上可与脑脊液（CSF）极为相似。因此，表皮样囊肿可能难以检测，或与脑脊液区分开来。本文报告3例颅内表皮样囊肿，其中1例在CT和常规MRI序列上与蛛网膜囊肿极为相似。进行了扩散加权磁共振成像（DWI）检查。所有3例表皮样囊肿相对于脑脊液均表现出明显的扩散受限，清晰地界定了每个病变的范围，并可与蛛网膜囊肿或扩大的脑脊液间隙相鉴别。