儿童幕上原始神经外胚层肿瘤的影像学特点  

Imaging characteristics of supratentorial primitive neuroectodermal tumors in children

作　　者：杨雁[1] 张新荣[1] 徐化凤[1] 

机构地区：[1]南京医科大学附属南京儿童医院放射科,210008

出　　处：《临床神经病学杂志》2013年第2期136-138,共3页Journal of Clinical Neurology

摘　　要：目的探讨儿童幕上原始神经外胚层肿瘤(SPNET)的影像学特点。方法对8例经病理学检查证实的SPNET患儿(19个月～4岁)的影像学资料(6例CT,2例MRI)进行回顾性分析。结果肿瘤位于额叶4例、颞叶3例、颞顶叶1例,呈囊实性6例、实性2例;呈类圆形7例、不规则形1例;边界清楚7例、不清1例;有钙化3例,均未见出血。CT或MRI增强后肿瘤实性区中度强化,囊性区无明显强化。MRI显示肿瘤实性部分呈T1WI稍低或等信号、T2WI稍高信号,信号不均匀;囊性区T1WI低信号、T2WI高信号。结论 SP-NET的影像学特点为病灶多位于额、颞叶,呈囊实性、类圆形,边界清楚,无出血;增强扫描肿瘤实性区有中度强化。Objective To explore the imaging characteristics of supratentorial primitive neuroectodermal tumors （SPNET） in children. Methods The imaging data（received CT in 6 cases, MRI in 2 cases） of 8 children patients （ 19 months to 4 years old） with SPNET proved by pathology examination were analyzed retrospectively. Results The tumors were located at frontal lobe in 4 cases, temporal lobe in 3 cases and parietotemporal area in 1 case; and the lesions presented as cystic-solid mass in 6 cases and as simple solid mass in 2 cases. The lesions were class round in 7 cases, irregular shape in 1 case; and the lesions with well-defined margin in 7 cases and with hazy border in 1 case. Calcification was found in 3 cases, but no hemorrhage was found in this group. On contrast images of CT and MRI, solid lesions enhanced moderately and cystic area had no obvious enhancement. On plain MRI images, solid lesions showed iso-intensity or low signal on T1WI and iso-intensity or high signal on T2WI, cystic lesions showed low signal on TIWI and high signal on T2WI. Conclusion Imaging characteristics of SPNET are that the lesions mainly located at frontal and temporal lobe of brain; presented as cystic-solid mass, class round, well-defined margin, no hemorrhage; solid lesions showed moderate enhancement witn contrast scanning.

关 键 词：幕上肿瘤 原始神经外胚层肿瘤 儿童 影像学 

分 类 号：R739.4[医药卫生—肿瘤]