【摘要】 目的:探讨脊髓室管膜瘤的磁共振(MRI)特征。方法:回顾分析经病理证实的16例脊髓室管膜瘤,所有患者均行了MRI平扫和增强扫描,分析肿瘤部位、大小、生长方式、信号特点及强化方式,有无囊变、出血及“帽征”。结果:全部脊髓室管膜瘤呈中心性生长,3例终丝室管膜瘤合并有椎间孔扩大,肿瘤平均累及2．7个椎体高度。在平扫MRI T1W1像上,大部分肿瘤呈等或低信号,在T2W1像上全部肿瘤呈高信号．10例肿瘤实质头端或尾端脊髓反应性囊变;3例瘤内囊变,2例可见肿瘤内出血,在T2W1像上,5例肿瘤可见“帽征”。增强扫描后,15例肿瘤表现为显著强化,14例肿瘤与正常脊髓分界清楚。结论:脊髓室管膜瘤MRI表现具有一定的特征性,了解这些特征,有助于脊髓室管膜瘤术前诊断和鉴别诊断。更多还原

【Abstract】 Objective:To study the MR imaging features of spinal cord ependymomas. Methods: 16 cases of ependymomas with histologically confirmed were retrospectively reviewed in terms of location, size, pattern of growth,signal intensity, enhancement pattern as well as the presence or absence of cystic degeneration,hemorrhage and "cap sign" on MRI imaging. Results; All spinal cord ependymomas showed epicenteral growth and 3 cases of filar ependymomas were complicated with inter-vertebral foramina dilatation. The tumors were involved in 2.7 numbers of vertebral highness along congifudinal direction. Majority of tumors were iso- or hypointense on T1W1 and all were hyperintense on T2W1. 10 cases of spinal ependymomas were associated with cranial and/or caudal reactive cystic degerantion of spinal cord. Three spinal ependymomas showed cystic area within the tumor and two with intratumoral hemorrhage. "Cap sign" was observed in 5 cases of tumors on T2WI imaging. 15 cases of tumors showed obviously enhancement and 14 cases had well-defined margins on the contrast-enhanced images. Conclusion: Spinal cord ependymomas have charicteristic MR features, which is helpful to improve the diagnosis.更多还原