腰骶段脊髓室管膜瘤的MRI诊断及其鉴别诊断

MRI Diagnosis and Differential Diagnosis of Spinal Cord Ependymoma in Lumbar and Sacral Segments

目的:分析腰骶段脊髓圆锥及终丝室管膜瘤的MRI影像特点,提高该病的诊断准确性和对鉴别诊断的认识。方法:回顾性分析经手术病理证实的14例腰骶段脊髓内室管膜瘤,所有病例均行MRI平扫和增强扫描,分析肿瘤的部位、病理类型、生长方式和信号特点、强化方式、有无囊变,观察有无含铁血黄素沉积。结果:肿瘤发生在脊髓圆锥2例,终丝12例,10例可见囊变,11例T_2W1见低信号,13倒不均一明显强化。结论:MRI可以反映脊髓内室管膜瘤MRI特征,是诊断和鉴别诊断的重要手段,有助于提高诊断正确率,有含铁血黄素沉积时倾向于诊断室管膜瘤。

ObjectiTe To analyze the MR imaging features of spinal cord ependymoma in the lumbar and sacral segments and to improve the accuracy of diagnosis and differential diagnosis.Methods Fourteen cases of patients with histologically proved spinal cord ependymoma in the lumbar and sacral segments were reviewed.Contrast-enhanced scans were performed in all patients.MR imaging feature analysis included tumor location,pathology types,pattern of growth,signal intensity, enhancement pattern,cysts in the tumor,and hemosiderin deposition.Results There were 2 lesions in the conus,12 lesions in the filum.A cystic component was seen in 10 cases.11 cases showed short T2 signal intensity.13 cases demonstrated heterogeneously obvious enhancement.Conclusion Spinal cord ependymomas have some MRI features such as hemosiderin deposition,which are helpful to make correct diagnosis and to improve the accuracy of diagnosis.