髓外硬膜下肿瘤的低场强MRI诊断(附42例分析)  

Low-field MRI diagnoses of intradural extramedullary tumors(Analysis of 42 cases)

作　　者：王永栋[1] 杨松利[1] 亓建洪[1] 朱建忠[1] 徐荣春[1] 王军 

机构地区：[1]泰山医学院附属医院,山东泰安271000 [2]新汶矿务局中心医院放射科,山东新汶271200

出　　处：《泰山医学院学报》2001年第1期30-33,共4页Journal of Taishan Medical College

摘　　要：目的　探讨低场强MRI对椎管内髓外硬膜下肿瘤的临床诊断价值。方法　对 42例手术和病理证实的椎管内髓外肿瘤进行回顾性分析研究 ,了解各种肿瘤的低场强MRI表现特点 ,提高对病变信号特点的认识水平。结果　神经鞘瘤 2 5例 ,占椎管内髓外肿瘤的 5 9 5 % ,是最常见肿瘤 ,MRI呈长T1和长T2信号 ,44 % (11/2 5例 )通过椎间孔向椎管外延伸呈指状或哑铃状形态。脊膜瘤 3例 ,呈等T1和等T2或稍长T2信号 ,均位于椎管内。畸胎瘤和椎管内囊肿类病变信号特异 ,较易诊断。结论　低场强MRI检查椎管内髓外硬膜下肿瘤图像清晰 ,组织分辨率较高 ,定位准确 。Objective: To evaluate the usefulness of low-field MRI in diagnosing intradural extramedullary tumors in the spinal canal. Methods: 42 cases of intradural extramedullary tumors in the spinal canal were retrospectively analyzed. Their characteristics in low-field MRI were further classified so as to understand the signal intensity of the tumor much better. Results: There were 25 cases of Schwanoma which is the commonest in the spinal canal and accounted for 59.5% of all intradural extramedullary tumors. They appeared as long T1 and long T2 signals. About 44%(11/25 cases) stretched outside the spinal canal through intervertibral hole and looked like finger shape or double-bell pattern characteristically. 3 cases of meningioma appeared as iso-T1 and iso-T2 or slightly long T2 signals, all were restricted inside the spinal canal. Teratomas and cystic diseases of intradural space have specific signals and are to be easily diagnosed by MRI .Conclusion Low-field MRI may get high quality images as well as high resolution of tissue signal when examining the intradural extramedullary tumors in the spinal canal. MRI can give accurate knowledge of the lesion position and appropriate estimation of its nature.

关 键 词：髓外硬膜下肿瘤 低场强 磁振成像 病例分析 

分 类 号：R445.2[医药卫生—影像医学与核医学]