摘要
目的分析颅内表皮样囊肿的CT和MRI表现。方法对26例经手术及病理证实的颅内表皮样囊肿的CT和MRI表现做回顾分析,其中20例做CT及MRI平扫加增强,6例只做CT平扫加增强。结果肿瘤位于桥小脑角区16例,鞍区7例,颅骨内2例,脑实质内1例。CT呈低密度25例,混杂高密度1例。MRI表现为T1WI低信号,T2WI高信号者16例。T1WI及T2WI高低混杂信号4例。增强仅2例边缘轻度强化余未见强化。1例脑组织受侵,轻度水肿表现。17例FLAIR上信号略有增高,3例信号明显增高。结论颅内表皮样囊肿的CT及MRI表现有一定特征性,尤其MRI对其诊断有重要价值。然对于不典型表现的表皮样囊肿有待于进一步加深认识。
Objective To analyze the features of intraeranial epidermoid cyst on CT and MRI imaging. Methods 26 patients with intracranial epidermoid cysts proven pathologically were examined with pre - and post - contrst enhanced CT and MR tinging, and 6 of 26 cases undergone CT plain scan. CT and MR imaging of 20eases were retrospectivelly reviewed. Results Among 26 cases,16 were located in tile cisterns of cerehell opontine angle, 7 in saddle area. 2 inside of the skull ; I in the brain essence. On CT ,25 cases were homogeneous hypodensc ,one case was promiscuous high density, 16 cases demonstrted inhomogeneous hypointensityimaging on T1WI ,and inhomogenous hyperintensity on TEW1.4 cases display inhomogeneous signal. No contrast enhancement was noted except 2 cases with slightly periphery enhancement. One case brain organization receives invades, There was edema around tumor . 17 cases demonstrated slightly inhomogeneous hyperintensity on FLAIR MR images,3 cases obviously advance. Conclusion The CT and MRI features of intracranial epidermoid cysts were certain characteristic, and MRI played an important role. as to uncharacteristic epidermoid cyst, there is still space for further research.
出处
《医学研究杂志》
2008年第4期105-108,共4页
Journal of Medical Research
