颅内脊索瘤的MRI表现及其临床意义  

MRI features and diagnostic value of intracranial chordoma

作　　者：甄俊平[1] 王峻[1] 张淑慧[1] 宋志珍[1] 阎平平[1] 杨晓棠[2] 

机构地区：[1]山西医科大学第二医院放射科 [2]山西医科大学第一医院放射科,太原市030001

出　　处：《实用医学影像杂志》2001年第4期212-215,共4页Journal of Practical Medical Imaging

摘　　要：目的探讨颅内脊索瘤的MRI改变及其临床意义。材料与方法对1992年至2001年21例经手术和病理证实的颅内脊索瘤的MRI影像学表现进行了回顾性分析。结果颅内脊索瘤大多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T1WI主要表现为低信号,T2WI表现为不均匀高信号,Gd-DTPA静脉注射增强后,均有较明显的不均匀强化。此外,侵及斜坡的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意义在于明确肿瘤的部位、大小和范围,评价肿瘤对颅底神经和大血管等重要结构的侵犯情况,有助于和斜坡与鞍区的其它疾病如骨软骨瘤、颅咽管瘤的鉴别。从而制定合适的手术方案。Objective To determine the clinic value of MRI in diagnosing the intracranial chordoma.Materials and Methods MRI features of 21 cases with intracranial chordoma,which were proved by biopsy and surgery,were retrospectively analyzed.Results Most of the intracranial chordoma 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 intracranial vessels of skull base.All tumors were hypointense on T2WI and enhanced more markedly,but steady heterogeneous.If the clivus was invaded,abnormal MR signal would appear inside the destructed clivus.Conclusion MRI examination is of great clinical value in delineating the location,size and extension of intracranial chordoma,especially show anatomic relation with surrounding structures such as the major intracranial vessels and nerves of skull base,which is very important in surgical planning.

关 键 词：脊索瘤 脑肿瘤 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学] R739.41[医药卫生—诊断学]