马尾和终丝部黏液乳头状室管膜瘤的MR征象分析

目的:探讨马尾、终丝部黏液乳头状室管膜瘤MRI特征.万法:回顾性分析经于术病理正实的12例马尾、终丝部黏液乳头状室管膜瘤的临床、病理及MRI资料,所有患者均行MRI平扫和增强扫描,分析肿瘤的长度、生长方式、信号特点.结果:马尾、终丝部黏液乳头状室管膜瘤累及2～9个椎体单位；肿瘤生长方式可分为椎体受累型(n=3)和椎体无...

MR imaging features of conus medullaris and filum terminale myxopapillary ependymomas at cauda equina and filum terminale

Objective：To study the MR imaging features of myxopapillary ependymomas at cauda equina and filum terminale.Methods：12 cases of myxopapillary ependymomas at cauda equina and filum terminale histologically proved were retrospectively reviewed in terms of length,pattern of growth and signal intensity.Results：The average number of vertebral units involved with tumors was 2~9.Myxopapillary ependymomas at cauda equina and filum terminale in our study were classified into vertebra involved（n=3） and non-vertebra involved（n=9） type.The former was generally accompanied by expansion of spinal canal and neural foraminae,bone destruction,while the latter usually presented central growth.On MR T1WI,tumors presented iso-or slight hypointensity,patchy high signal appeared in 8 cases.On T2WI,tumors presented hyperintensity,cystic component was shown in 3 cases,and reactive cysts were shown in the head-side of the spinal cord in 2 cases.All tumors showed marked heterogeneous enhancement.Conclusion：MRI findings of conus medullaris and filum terminale myxopapillary ependymomas have certain characteristics,understanding these features will help to make correct diagnosis.