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。
Objective:To analyze the CT and MRI manifestations of demyelinating pseudotumor of the brain and to increase the diagnosis accuracy.Methods:The CT and MRI imaging features of three pathologically proved cases of demyelinating pseudotumor of the brain were retrospectively analyzed.Results: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 T 1WI and high signal on T 2WI.The majority showed diffuse or annular enhancement.Peritumoral edema and space occupying-effect were found relatively mild.Conclusion:The CT and MRI manifestations of demyelinating pseudotumor of the brain are short of characteristic.But good understanding of clinical,radiologic and pathologic manifestations can increase the diagnosis accuracy of this disease.
出处
《放射学实践》
2005年第2期118-120,共3页
Radiologic Practice
关键词
脱髓鞘疾病
体层摄影术
X线计算机
磁共振成像
Demyelinating diseases
Tomography,X-ray computed
Magnetic resonance imaging
