颅内室管膜下瘤的MR诊断  

MR Diagnosis of Intracranial Subependymomas

作　　者：温洋[1] 戴建平[1] 

机构地区：[1]首都医科大学附属北京市神经外科研究所神经影像中心,北京100050

出　　处：《实用放射学杂志》2005年第8期793-796,共4页Journal of Practical Radiology

摘　　要：目的分析颅内室管膜下瘤的MR表现,提高诊断水平。方法回顾性分析17例病理证实的室管膜下瘤影像(MR16例,CT1例)表现,其中男11例,女6例。结果17例中,侧脑室9例,四脑室、透明隔各2例,三脑室、桥前池、右小脑桥脑角(CPA)及鞍上池各1例。MR成像的16例中,T1WI为低、略低或等信号,T2WI均为较高信号影。17例中,11例信号不均匀、有囊变;12例无强化或者轻微强化。结论MRI可以很好地显示、评价颅内室管膜下瘤,当患者具备上述特点时高度提示该诊断。Objective To study the MR imaging features of intracranial subependymomas and to improve the knowledge more about it. Methods The imaging features of intraeranial subependymomas in 17 cases proved pathologically were retrospectively analyzed, among which 11 cases were male and 6 cases were female, 16 cases had MR images and 1 case only had CT images. Results MR appearances of intraeranial subependymomas were as follows ：16 cases were all hyperintense relative to the normal grey matter on T2 -weighted images and hypointense or isointense on T1 - weighted images. 12 cases showed no enhancement or minimal enhancement after Gd - DTPA administration . 9 of 16 cases were located in lateral ventricle, 2 were in septum pellueidum, and the rest 5 were in fourth ventricle ,third ventricle , prepontine cistern, right CPA and chiasmatie cistern respectively. In one case , CT showed isodensity and was enhanced in CE -CT,the lesion was situated in fourth ventricle. In all 17 cases, 11 were accompanied with mieroeystie structures. Conclusion Intraeranial subependymomas are best delineated by MR imaging. The diagnosis of intraeranial subependymomas should be considered when above findings are confronted.

关 键 词：脑 室管膜下瘤 磁共振成像 

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