幕上脑实质囊性室管膜瘤20例MRI分析  

MRI Analysis of Cystic Ependymoma in the Supratentorial Brain Parenchyma：A Report of 20 Cases

作　　者：任建政[1] 李正华[1] 纪涛[1] 常正伟[1] 

机构地区：[1]武警陕西总队医院放射科,陕西西安710054

出　　处：《实用放射学杂志》2011年第2期177-179,共3页Journal of Practical Radiology

摘　　要：目的分析幕上脑实质囊性室管膜瘤的MRI表现，旨在提高对脑实质囊性室管膜瘤诊断的准确率，加深对本病的再认识。方法回顾性分析经手术病理证实的20例幕上脑实质内囊性室管膜瘤的MRI表现，重点观察肿瘤的大小、部位、结构、与脑室的关系、水肿情况及增强扫描特征。结果本组幕上脑实质囊性室管膜瘤好发于颞顶枕交界部位（18例，占90％）。肿瘤平扫多呈大囊样改变（16例，占80％），肿瘤周围多数无水肿（18例，占90％）。增强扫描表现囊壁呈环形均匀强化（19例，占95％）。结论20例脑实质囊性室管膜瘤的MRI表现有一定的特征性，MRI表现有助于室管膜瘤的鉴别诊断。Objective To analyse the MRI appearance of cystic ependymoma in the supratentorial brain parenchyma, so that to improve the accuracy of diagnosis of this disease. Methods MRI features of cystic ependymoma in the supratentorial brain parenchyma in 20 cases proved by pathology were analysed with and the emphasis of the tumor size, location, structure, relationship with the ventricle, edema around the tumor and contrast--enhanced characteristics. Results The tumors mostly located in the bounded district of temporal,occipital and parietal lobe（18 cases, 90%）, were cystic（16 cases, 80%）, and had no edema around the tumor（18 cases, 90%）. The tumor showed homogeneous ring enhancement after contrast medium injection（19 cases, 95%）. Conclusion MRI appearences of cystic ependymoma in the supratentorial brain parenchyma are special,and MRI is helpful in the diagnosis and differential diagnosis of this disease.

关 键 词：脑 囊性室管膜瘤 磁共振成像 

分 类 号：R739.41[医药卫生—肿瘤] R445.6[医药卫生—临床医学]