儿童小脑毛细胞型星形细胞瘤的MRI表现  

MRI MANIFESTATION OF CEREBELLAR PILOCYSTIC ASTROCYTOMA IN CHILDREN

作　　者：王德广[1] 白艳春[1] 于淼 孙振环[1] 徐腾腾 刚宪祯[1] 

机构地区：[1]解放军第404医院影像科,山东省威海市264200 [2]广东省广州市黄埔区红十字会医院

出　　处：《中国煤炭工业医学杂志》2017年第4期413-417,共5页Chinese Journal of Coal Industry Medicine

摘　　要：目的分析儿童小脑毛细胞星形细胞瘤的MRI特点,以提高对此肿瘤的认识。方法回顾性分析经手术病理证实的15例小脑毛细胞型星形细胞瘤患儿的临床资料及影像资料,研究其T1 WI、T2 WI、FLA IR和增强后的MRI表现,MRI表现为实性型、囊实型、壁结节型、单纯囊肿型。结果毛细胞星形细胞瘤的MRI表现有如下特点:发现病灶在小脑蚓部9例、小脑半球6例。MRI表现:壁结节型(囊性病变为主伴壁结节)8例,囊实型4例,单纯囊肿型(无壁结节或实性肿块)1例,实性型(实性肿块为主伴有或不伴有囊性改变)2例。肿瘤的活性部分于FLAIR和T2加权呈高信号,增强后明显强化。T1加权肿瘤壁结节及实性部分呈稍低信号或等信号,肿瘤囊性部分呈均匀低信号。结论小脑毛细胞星形细胞瘤有比较典型的MRI特点,结合患者的年龄及临床发病特点,有助于其术前诊断。Objective To analyze the MRI manifestations of cerebellar pilocystic astrocytoma in children. Methods Clinical materials and imaging findings of cerebellar astrocytoma in 15 patients proven by surgery and pathology were analyzed retrospectively in attempt to explore MRI features of T1WI,T2WI and Gd- enhanced TIWI images. Results Among all 15 cases ,9 lesions were located in cerebellar vermis while 6 were in cerebellar hemisphere. MRI features： 8 cases were cystic with mural nodule types, 4 cases were solid-cyst type,1 case was pseudocystic with mural nodule, 2 cases solid. On T1WI images, the cystic component of the tumors were homoge＇neously low signal intensity and tumoral mural nodule were slightly hypo or iso- hypo signal intensity. Tumoral component was of high intensity in FLAIR and T2WI images, and significantenhancement after contrast- mediumm injection. Conclusions Cerebellar astrocytoma has typical MRI imging features. Combining ages and clinical data, it plays an impotant role in dignosis before sugery.

关 键 词：毛细胞星型细胞瘤 磁共振成像 儿童 

分 类 号：R739.4[医药卫生—肿瘤]