脑脂肪栓塞综合征的MRI诊断和鉴别诊断

目的探讨脑脂肪栓塞综合征(CFE)的MR I影像特点和鉴别诊断。方法回顾分析了4例确诊CFE的MR I影像特征。结果MR I显示两侧半卵圆中心、两侧放射冠区、两侧丘脑、两侧脑室旁深部脑白质、两分水岭区脑皮质、胼胝体、脑干和小脑半球可见点、片状长T2信号灶,部分病灶在T1显示为低信号,部分为等信号。两侧病灶部位基本对称,中脑病灶呈现倒“八”字征。其中2例病人显示为脑肿胀。结论MR I的T2加权像检查对CFE的诊断具有一定的特征性,但要密切结合病史、体征和实验室检查与弥漫性轴索损伤等疾病相鉴别。

Diagnosis and Differential Diagnosis of Cerebral Fat Embolism Syndrome on MRI

Objective To discuss the features of MRI and differential diagnosis of cerebral fat embolism syndrome(CFE).Methods The features of MRI of 4 final diagnosis cases of CEF were retrospectively analysed.Results MRI showed that there were spotty and patchy high T_2-weighted signals and some of them were low or equal signals on T_1-weighted.These signals were distributed in bilateral centrum semiovale,corona radiata,thalamus,deep part white matter of brain along the lateral ventricle,the cortex of brain of watershed,collose,brain stem and the hemisphere of cerebellum.The position of these abnormal signals was symmetric in the rough.The figure of the MRI signals in the midbrain liked the reverse Chinese number "eight".Brain swelling was showed in 2 of 4 cases.Conclusion There are some features of the CEF on T_2-weighted of MRI,but the history,the physical signal and the results of laboratory must be considered,and must be differential diagnosed with the diseases liking diffuse axonal injury,etc.