髓外硬膜下肿瘤的MRI研究  

MRI of Intradural Extramedullary Tumors

作　　者：陈宇 王小宜[1,2] 王焕申[1,2] 

机构地区：[1]深圳市人民医院MR室 [2]湖南医科大学湘雅医院放射科

出　　处：《中国医学计算机成像杂志》1998年第3期164-167,共4页Chinese Computed Medical Imaging

摘　　要：目的：探讨ＭＲＩ对髓外硬膜下各类肿瘤的定性诊断价值（着重在神经鞘瘤、神经纤维瘤和脊膜瘤的鉴别）。材料和方法：对已手术和病理证实的９１例髓外硬膜下肿瘤的ＭＲ表现用各种指标进行系统比较。结果：神经类肿瘤多呈长Ｔ１长Ｔ２信号，易有坏死／囊变、斑点征、脊髓受压水肿、可跨越椎间孔、多不均匀性明显强化，其中神经鞘瘤易囊变，仅跨越单个椎间孔，神经纤维瘤常多发和跨越多个椎间孔。脊膜瘤多呈等Ｔ１稍长或等Ｔ２信号，较均匀性一般强化和脊膜征，不跨越椎间孔，无脊髓受压水肿。结论：ＭＲＩ能对大多数肿瘤进行初步定性。Purpose:To investigate the value of intradural extramedullary tumors(especially in Neurilemmomas、Neurofibromas and Meningiomas).Materials and methods:The MR imaging of 91 patients with intradural extramedullary tumors proved by surgery and pathology were systematically compared by all kinds of MR features.Results:Neuromas tended to show hypointense on T1WI and hyperintense on T2WI,frequently associated with necrosis or cyst、dot sign、cord-edema、crossing intervertebral foremen and markedly hetergeneous enhancement.Neurilemmomas were characterized by cyst and crossing single intervertebral foremen.Neurofibromas were characterized by multiplicity and crossing several intervertebral foremen.Meningiomas tended to show isointense on T1WI and slight hyperintense or isointense on T2WI,mild or moderate homogeneous enhancement and dural tail sign,and no crossing intervertebral foremen and cord-edema.Conclusion:Conventional MRI can primarily differentiate the majority of tumors and offer reliable basis for clinically to choose management metheds and predict the prognosis.

关 键 词：髓外硬膜下肿瘤 磁共振成像 定性研究 

分 类 号：R739.42[医药卫生—肿瘤]