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作者单位:430070 武汉,广州军区武汉总医院放射科作者简介:邱怀明(1975-),男,湖北麻城人,硕士,住院医师,主要从事介入治疗工作。
・中枢神经影像学・脑脱髓鞘性假瘤的C T及M RI诊断邱怀明,高保安,曾晓华,金德勤【摘要】 目的:分析脑脱髓鞘性假瘤的CT及MRI表现,提高对该疾病的影像诊断水平。
方法:结合文献报道,回顾性分析3例经手术病理证实的脑脱髓鞘性假瘤的CT及MRI表现。
结果:所有病例均表现为脑内单发肿块样病变,CT平扫多呈低密度改变,MRI检查多表现为长T1、长T2信号,增强扫描呈弥漫性或环形强化,病灶周围水肿及占位效应相对较轻。
结论:脑脱髓鞘性假瘤的CT及MRI表现缺乏特征性,但全面认识该疾病的临床特征、影像表现和病理改变,可提高对该疾病的诊断水平。
【关键词】 脱髓鞘疾病;体层摄影术,X线计算机;磁共振成像【中图分类号】R814.42;R744.5 【文献标识码】A 【文章编号】100020313(2005)022*******CT and MRI of Demyelinating Pseudotumor of the B rain Q IU Huai2ming,GAO Bao2an,ZEN G Xiao2hua,et al.Department of Radiology,PL A Wuhan G eneral Hospital,Wuhan430070,P.R.China【Abstract】 Objective:To analyze the CT and MRI manifestations of demyelinating p seudotumor of the brain and to in2 crease the diagnosis accuracy.Methods:The CT and MRI imaging features of three pathologically proved cases of demyelina2 ting pseudotumor of the brain were retrospectively analyzed.R esults:All cases appeared as a solitary mass without adjacent accompanying lesions.On plain CT scans,the majority of lesions presented as low density;on plain MRI scans,the lesions manifested as homogenous low signal on T1WI and high signal on T2WI.The majority showed diffuse or annular enhance2 ment.Peritumoral edema and space occupying2effect were found relatively mild.Conclusion:The CT and MRI manifestations of demyelinating p seudotumor of the brain are short of characteristic.But good understanding of clinical,radiologic and pathologic manifestations can increase the diagnosis accuracy of this disease.【K ey w ords】 Demyelinating diseases;Tomography,X2ray computed;Magnetic resonance imaging 中枢神经系统脱髓鞘性假瘤是介于多发性硬化和急性播散性脑脊髓炎之间的一类特殊的中枢神经系统脱髓鞘性疾病,临床罕见,常误诊为脑肿瘤。
