四脑室占位病变的MRI诊断价值  

MRI Diagnosis of Fourth Ventricular Masses

作　　者：刘建新[1] 于恩庆[1] 刘向东[1] 张继东[1] 

机构地区：[1]齐齐哈尔市第一医院,黑龙江齐齐哈尔161005

出　　处：《医疗卫生装备》2009年第9期86-87,96,共3页Chinese Medical Equipment Journal

摘　　要：目的:探讨四脑室占位病变的MRI影像学特征及鉴别诊断。方法:回顾性分析90例四脑室占位病变的MRI影像学表现。其中经手术证实83例;经3名以上专门从事神经放射诊断工作的主任医师、副主任医师确诊7例。结果:本组病例中包括髓母细胞瘤(27例)、管室膜瘤(18例)、脉络丛乳头状瘤(11例)、转移瘤(7例)、星形细胞瘤(6例)、胶质瘤(混合型或未分类5例)、表皮样囊肿(5例)、脑囊虫(4例)、海绵状血管瘤(4例)、静脉血管畸形(3例)。肿瘤形态呈类圆形及不规则型,可为实性或囊实性。增强检查多数病灶可强化,少数无明显强化。结论:四脑室病变的诊断主要依据MRI的影像学征象,在诊断时应注意区分原发于四脑室内或外侵至四脑室的病变,以利于鉴别诊断。Objective To discuss MRI characteristics and differential diagnosis of fourth ventricular masses. Mothods We retrospectively analyzed 90 cases＇ MRI findings of fourth ventricular masses that were proved by the surgery （n=83） or were diagnosed by more than three professors and assistant professors in the neuroradiology field （n=7）. Results These masses in our study included the medulloblastomas （n=27）, the ependmomas （n=18）, the choroid plexus papillomas （n：ll）, the metastases （n=7）, astrocytoma （n=6）, astrocytomas and glioma （undifferentiated and mixed patten are 5cases）, epidermoid cysts （n=5）, cerebral cysticercosis （n=4）, cavernous hemangiomas （n=4）, venous malformation （n：3）. Their shapes were spheroridal or irregular, and some masses could become cystic changes in the masses. Most masses could be enhanced or a few couldn＇t be enhanced with DPTA on MRI. Conclusion The demonstration of fourth ventricular depends on MR findings. It is important to differentiate these masses between within and without fourth ventricular for the differential diagnosis. [Chinese Medical Equipment Journal ,2009,30（9）：86-87,96]

关 键 词：四脑室 占位 诊断 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学]