外伤后细菌性致死性肉芽肿MRI表现  

MRI Appearances of Fatal Bacteria Granuloma after Trauma

作　　者：印弘[1] 崔金利[1] 汤丽华[1] 宦怡[1] 高天文[2] 常英娟[1] 徐俊卿[1] 葛雅丽[1] 赵海涛[1] 

机构地区：[1]第四军医大学西京医院放射科,陕西西安710032 [2]第四军医大学西京医院皮肤科,陕西西安710032

出　　处：《实用放射学杂志》2008年第5期577-580,共4页Journal of Practical Radiology

摘　　要：目的探讨外伤后细菌性致死性肉芽肿(FBGT)的MRI表现以及MRI在FBGT诊断中的价值。方法回顾性分析经病理证实的8例FBGT患者的MRI,对病变的分布、信号特征以及数目等进行总结。结果8例患者均有颜面部瘢痕,4例脑内未见异常,4例出现脑内病变。脑内肉芽肿见于灰白质交界处以及灰质,肉芽肿结节在T1WI呈等或稍低信号,T2WI为高信号;部分病灶有中央出血,在T1WI表现为高信号,T2WI表现为稍高信号;肉芽肿周围脑白质均有中度水肿,水肿沿皮层下分布,在T2WI以及FLAIR为高信号。肉芽结节呈中等强度的均匀增强,可表现为环形、斑片状及结节状强化。2例可见脑膜线样增强。结论FBGT有一定的影像特点。MRI可提供重要的依据。Objective To study the M RI features of fatal bacteria granuloma after trauma（FBGT） and to evaluate the diagnostic value of M RI in FBGT. Methods M RI data of FBGT proved by pathology in 8 cases were analysed,including the location,number and MRI appearance of FBGT. Results 8 patients all had facial scar. Four patients were accompanied with brain lesions and the other four not. The intracranial granuloma appeared as iso -or hypointensity on T1 WI,hyperintensity on T2WI,the central hemorrhage conld be seen in part lesions and appeared as hyperintensity on T1 WI and T2 WI. There was subcortical perilesion edema spread along white matter tract and appeared as hyperintensity on T2WI and FLAIR. The granulomas were moderate enhancement after contrast injection and appeared as ring,patching or nodal enhancement,meningeal linear - like enahncement were showed in two cases. Conclusion FBGT has special MRI features. MRI is a useful tool in diagnosis of FBGT.

关 键 词：脑 外伤后细菌性致死性肉芽肿 磁共振成像 

分 类 号：R742[医药卫生—神经病学与精神病学] R445.2[医药卫生—临床医学]