表皮样囊肿的非典型CT和MRI表现。

Atypical CT and MRI aspects of an epidermoid cyst.

作者信息

Ben Hamouda M, Drissi C, Sebai R, Hammami N, Ghorbel D, Zammel I, Nagi S, Belghith L, Khaldi M

机构信息

Department of Neuroradiology, Institut National de Neurologie, Tunis, Tunisia.

出版信息

J Neuroradiol. 2007 May;34(2):129-32. doi: 10.1016/j.neurad.2007.01.126.

DOI:10.1016/j.neurad.2007.01.126

PMID:17368766

Abstract

We report a case of an unusual epidermoid cyst (EC) of the cerebellopontine angle that appeared hyperdense on computed tomography (CT) scanning, hyperintense on T1-weighted MR images and hypointense on T2-weighted magnetic resonance (MR) images. Diffusion-weighted imaging showed a hypointense lesion. We discuss imaging characteristics of ECs, explain the atypical findings in our case and confirm that the signal seen on diffusion-weighted images in the EC is related to a T2 effect.

摘要

我们报告一例小脑桥脑角罕见的表皮样囊肿（EC）病例，该囊肿在计算机断层扫描（CT）上表现为高密度，在T1加权磁共振（MR）图像上表现为高信号，在T2加权MR图像上表现为低信号。扩散加权成像显示为低信号病变。我们讨论了表皮样囊肿的影像学特征，解释了本例中的非典型表现，并证实表皮样囊肿在扩散加权图像上所见信号与T2效应有关。