间变性室管膜瘤的MRI表现与病理对照研究(附5例报告)

The Comparative Study of MRI Features of Anaplastic Epondymoma and Pathological Results

目的探讨间变性室管膜瘤的MRI表现与病理改变的关系。资料与方法回顾性分析5例经手术病理证实的间变性室管膜瘤患者术前的MRI平扫及增强扫描表现并与病理对照研究。结果5例中,幕上3例,为间变性室管膜瘤,主要发生于脑实质内,病灶中心表现为等、短T1信号,等、短或混杂T2信号;幕下2例,为室管膜瘤伴部分间变,主要发生于第四脑室底。病灶呈长T1、稍长T2信号,其内见多发略短T2信号,瘤周无水肿,延髓及小脑受压移位。结论间变性室管膜瘤的MRI表现与病理改变有关联性,可为临床诊断提供客观依据。

Objective To discuss the correlation MR features of anaplastic ependymoma with pathological results. Materials and Methods MR features and pathological results of 5 cases with anaplastic ependymomas were analyzed retrospectively. Results Among 5 patients,3 were located in superior tentorium of cerebellum,2 in inferior tentorium of cerebellum （fourth ventricular）. The former were presented with equal or short T1 intensity signal, and equal, short or mixed T2 intensity signal, the later were presented long T1 ,T2 intensity signal without peritumor edema, surrounding structures were shifted. Conclusion There is correlation between MR features of anaplastic ependymoma with pathological results.