颅内脊索瘤的MRI诊断价值  

MRI diagnostic value of intracrania chordoma

作　　者：伍建林[1] 林茂盛 郎志谨[1] 沈天真[2] 陈星荣[2] 

机构地区：[1]大连医科大学附属一院放射科,辽宁大连116011 [2]上海医科大学附属华山医院放射科,上海200011

出　　处：《中国临床医学影像杂志》2000年第1期7-10,共4页Journal of China Clinic Medical Imaging

摘　　要：目的:探讨磁共振成像(MRI)技术诊断颅内脊索瘤的价值。材料与方法:回顾性分析了18例经手术和病理证实的颅内脊索瘤的MRI表现。结果:颅内脊索瘤大部分(本组16例,占889%)发生于颅底中线处的斜坡和/或鞍区,并广泛侵犯颅底的神经和大血管等重要结构;在T1加权像上肿瘤主要表现为低信号,T2加权像上表现为不均匀高信号,Gd-DTPA静脉注射增强后(8例)均出现较明显的不均匀强化。此外,有15例(833%)脊索瘤均出现斜坡形态和其内MR信号的异常改变。结论:MRI检查颅内脊索瘤的临床价值在于明确肿瘤的部位、大小与范围,尤其是精确的评价肿瘤与颅底神经和大血管等重要结构的解剖关系。Objective:To study the MRI diagnostic value of intracranial chordoma.Materials and Methods:The MRI findings of 18 patients with intracranial chordoma proved by operation and pathology were analysed retrospectively.Results:Most of the intracranial chordoma(16 cases in our group,88 9%)were located in the middle area of the skull base such as clivus and/or sellar region and always invaded extensively the nerves and major in tracranial vessels of skull base.All tumors were hypointense on T1-weighted imaging and heterogeneous hyperintense on T2-weighted imaging,On Gd-DTPA contrast-enhanced T1-weighted imaging 8 chordomas enhanced more markedly,but steady heterogeneous.Moreover,the clivus was invaded in 15 cases(83.3%)with abnormal MR signal inside the destructed clivus.Conclusion:MRI examination is of great clinical value in delineating the location,size and extension of intracranial chordoma,especially evaluation its anatomic relation with surrounding structures such as the major in tracranial vessels and nerves of skull base,which is very important in surgical planning and evaluating prognosis

关 键 词：脊索瘤 脑肿瘤 磁共振成像 诊断 预后 

分 类 号：R739.410.4[医药卫生—肿瘤]