MR诊断中枢神经细胞瘤  

MR diagnosis of central neurocytoma

作　　者：赵天平[1] 程敬亮[2] 张勇[2] 

机构地区：[1]焦作市人民医院MR室,河南焦作454002 [2]郑州大学第一附属医院MR室,河南郑州450052

出　　处：《中国医学影像技术》2009年第9期1557-1559,共3页Chinese Journal of Medical Imaging Technology

摘　　要：目的探讨中枢神经细胞瘤的MRI特点及其诊断价值。方法回顾性分析经手术病理证实的中枢神经细胞瘤17例,男10例,女7例,年龄21～41岁,平均29.6岁。结果全部肿瘤均位于侧脑室透明隔、邻近Monro孔;MRT1WI呈等、低信号,T2WI呈不均匀高信号。矢状位和冠状位T1WI及增强扫描图像上,9例可见由胼胝体和侧脑室顶呈网状或丝条状垂向下的瘤组织,轴位7例见瘤组织牵拉侵犯单侧或双侧脑室侧壁形成索条状影。所有肿瘤均伴多发囊变,部分瘤体内可见出血及血管流空征象。肿瘤在增强扫描中多呈较明显不均匀强化。结论中枢神经细胞瘤MRI表现有一定的特异性,有助于诊断。Objective To examine whether there are differential activations of cerebellum and other brain regions for ADHD children in n-back working memory task or not.Methods Twelve ADHD children and twelve controls（matched with age,sex,IQ,handedness and extent of education） underwent rapid event-related functional magnetic resonance imaging（fMRI） when they performed a Categorial n-back Working Memory Task.One sample and two samples t-test were performed for fMRI data respectively intra-and inter-groups with SPM2.Results Compared with healthy children,ADHD children showed weaker activation in left posterior cerebellar lobe.Conclusion The pattern of the activation of the left posterior cerebellar lobe for ADHD children is significantly different from that of controls.This might suggest that there is dysfunction in cerebellum for children with ADHD,and the cerebellar dysfunction might play a critical role in pathophysiology of ADHD.

关 键 词：中枢神经系统肿瘤 磁共振成像 诊断显像 

分 类 号：R739.41[医药卫生—肿瘤] R445.2[医药卫生—临床医学]