小脑发育不良性节细胞瘤MR影像表现与病理基础  

MRI features and pathological basis of dysplastic gangliocytoma of cerebellum

作　　者：郝跃文[1] 刘燕[2] 印弘[1] 

机构地区：[1]第四军医大学西京医院放射科,陕西710032 [2]陕西中医药大学医学技术系

出　　处：《放射学实践》2015年第10期1016-1018,共3页Radiologic Practice

摘　　要：目的:探讨小脑发育不良性节细胞瘤(LDD)的磁共振表现特征,旨在提高对本病的认识。方法:回顾性分析经病理证实的7例小脑发育不良性节细胞瘤的MRI表现。全部病例均行MR平扫及增强扫描。结果:7例患者中4例病变累及小脑半球和蚓部,3例累及小脑半球。整个肿瘤有许多粗大的类似小脑形态的结构组成,排列呈斜行或纵行,呈"虎纹征",即T1WI呈条纹状相间的等、低信号或层状排列结构;T2WI呈条纹状相间的等、高信号;增强后肿瘤无明显强化。结论:小脑发育不良性节细胞瘤发病率极低,但具有影像学特征性表现,熟悉其MRI特征,能够在术前对其作出正确诊断。Objective：To explore the MRI features of dysplastic gangliocytoma of cerebellum,and aim at improving the understanding of the disease.Methods：The MRI data of 7cases of dysplastic gangliocytoma of cerebellum,confirmed by operation and pathology,were analyzed retrospectively.All 7cases received plain MRI scan and enhancement scan.Results：4cases located in the cerebellar hemisphere and vermis,3cases located in the cerebellar hemisphere.The whole tumor was composed of many thick cerebellum-like structures,arranging in oblique line or longitudinal line.MRI showed ＂tiger striped sign＂,the lesions presented a striated pattern of alternating linear bands of low signal on T1 WI and high signal on T2 WI,all the tumors showed non-enhancement.Conclusion：The incidence of dysplastic gangliocytoma of cerebellum is very rare,but MRI performance has certain characteristics.Being familiar with these,even without relying on pathology,we would be able to make an appropriate diagnosis.

关 键 词：磁共振成像 神经节细胞瘤 中枢神经系统 

分 类 号：R445.2[医药卫生—影像医学与核医学] R322.81[医药卫生—诊断学]