儿童脑干胶质瘤的MRI诊断  

The MRI diagnosis of brain stem gliomas in children

作　　者：金彪[1] 高煜[1] 冯贇[1] 朱杰明[1] 

机构地区：[1]上海第二医科大学附属新华医院放射科,200092

出　　处：《放射学实践》2000年第3期193-195,共3页Radiologic Practice

摘　　要：目的 :探讨脑干胶质瘤的MRI特征。方法 :收集经证实的脑干胶质瘤 12例。结果 :MRI表现有以下 3个特征 :①肿瘤使脑干的外形增大 ,通过不同序列和断面显示肿瘤的精确部位 ,矢状面对于显示胶质瘤的早期改变、顶盖部位及延髓颈髓联合部位的胶质瘤具有独特作用。②肿瘤的T1加权像呈低信号或低等混合信号 ,T2 加权像呈高信号 ,注射造影剂 (GD DTPA)后除少数不增强外有 3种强化方式 :弥漫型、结节型、环状。③脑积水不常见 ,除非肿瘤位于顶盖部位压迫中脑导水管。结论Objective:To analyse MRI features of brain stem gliomas in children.Methods:Twelve patients of surgically proved brain stem gliomas were analyzed.Results:Three important MRI features of brain stem gliomas were found:①enlargement of brain stem contour.Using different sequences and planes the precise tumor location could be obtained.Sagittal scan could well display the early stage of brain stem glioma, the tectal glioma and cervicomedullary junction glioma.②there was hypointensity or hypo isointensity on T 1WI and hyperintensity on T 2WI. There were three types of enhancement after Gd DTPA administration:diffuse, nodular and ringlike,except no enhancement in minority of patients.③hydrocephalus was uncommon in brain stem glioma,except those involving the tectal plate and compressing the midbrain aqueduct.Conclusions:MRI is the method of choice for diagnosing brain stem glioma in children.

关 键 词：磁共振成像 儿童 脑干胶质瘤 

分 类 号：R739.41[医药卫生—肿瘤]