脑内脑室外神经细胞瘤的MR影像表现  

MR imaging manifestations of extraventricular neurocytoma

作　　者：胡淼淼 高培毅[2] 

机构地区：[1]中国地质大学(北京),北京100083 [2]首都医科大学附属北京天坛医院放射科北京市神经外科研究所,北京100050

出　　处：《实用放射学杂志》2017年第12期1820-1823,共4页Journal of Practical Radiology

基　　金：北京市医院管理局临床医学发展专项经费资助项目（XMLX201508）.

摘　　要：目的 回顾性分析脑室外神经细胞瘤（EVN）的MR影像学表现及其鉴别诊断。方法 经手术病理证实7例EVN患者，行MR平扫及增强扫描，其中1例患者行扩散加权成像（DWI）扫描。结果 病变发生于大脑4例，小脑2例，均有灰白质受累，鞍区1例。囊实性病变5例，实性病变2例。5例边界清楚，2例边界不清。2例病灶可见瘤周水肿。实性部分T1WI呈等、稍低信号,T2WI呈等、稍高信号5例，可见出血及坏死。实性部分可呈轻度、中度或明显不均匀强化,囊性部分呈薄壁环形强化。结论 EVN的MRI表现具有一定的特点，脑内边界清楚的囊实性病变，同时累及灰白质，应考虑该病诊断的可能。Objective To analyze retrospectively the MR manifestations and differential diagnosis of extraventricular neurocytoma （EVN}. Methods 7 patients with EVN confirmed by pathologic examination were performed non-enhanced and contrast-enhanced MR scan, and one of them was also performed DWI.Results 4 tumors were located in cerebra, 2 tumors located in cerebellum, involving both cortex and white matter, and 1 tumor was located in the seller region. 5 tumors were solid-cystic lesions and 2 tumors were solid lesions. 5 lesions were well demarcated and 2 lesions were ill defined. Edema around the lesion was found in 2 cases. The solid part of tumors showed iso-or hyper intensity on T1 WI, hypo-or hyper intensity on T2 WI. Necrosis and hemorrhage occurred in some cases. The degree of enhancement in solid part ranged from mild enhancement to intense enhancement heterogeneously. The cystic part showed ring like enhancement with a thin wall. Conclusion The manifestations of EVN on MRI have some characteristics. If a solid-cystic lesion was well defined, involving both cortex and white matter, EVN should be considered.

关 键 词：脑室外 神经细胞瘤 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]