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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,有助于制定合适的手术方案和估计预后
Objective: To investigate the value of magnetic resonance imaging (MRI) in the diagnosis of intracranial chordoma. Materials and Methods: MRI findings of 18 cases of intracranial chordomas confirmed by surgery and pathology were retrospectively analyzed. Results: Most of the intracranial chordomas (16 cases in this group, accounting for 889%) occurred in the slopes and / or sellar areas at the midline of the skull base and extensively infringed upon the important structures such as nerves and blood vessels in the skull base. The tumor mainly showed low signal, the T2 weighted image showed uneven high signal, Gd-DTPA enhanced intravenous injection (8 cases) showed obvious heterogeneous enhancement. In addition, there were 15 cases (833%) of chordoma showed ramp morphology and abnormal changes of MR signals. Conclusion: The clinical value of MRI in the diagnosis of intracranial chordoma lies in that the location, size and scope of the tumor are clear, and the anatomical relationships between the tumor and the important structures such as the skull base nerve and the great vessels are accurately evaluated. It is helpful to make appropriate surgical plans and Estimate the prognosis