脊索瘤的MRI表现

目的：探讨脊索瘤的MRI表现及其诊断价值。方法：回顾性分析17例经临床病理证实的脊索瘤的MRI表现。结果：颅底脊索瘤8例，骶尾部脊索瘤9例，邻近颅底及椎体骨质均有溶骨性破坏，伴硬膜外及骶前较大软组织肿块。17例中16例信号不均匀，T1WI呈低、等信号，T2WI呈明显高信号，MRI增强扫描后，肿瘤均有轻度或中度不均匀性强化。结论：T2WI显著高信号是脊索瘤的特征性MRI表现，有重要鉴别诊断意义，MRI反映肿瘤的部位、侵犯范围以及显示骨质破坏作用均优于CT。

MR imaging manifestations of chordoma

Objective:To discuss MR imaging manifestation and clinical signification of chordoma.Methods:Retrospectively analyzing the 17 cases of MR imaging manifestation of clinical signification demonstrated by clinical cases.Results:There were 8 cases of lesions located in the region of skull base and 9 cases located in the sacrococcygeal region.Bone destruction exists in the areas near skull base and vertebral bodies, linked by big epidural and presacral soft tissue masses. Among 17 cases, disequilibrium manifested in the signals of 16 cases, and the signal intensities of them were low-intermediate on T 1WI ,extremely high on T 2WI. The chordomas appeared unbalanced consolidated in low or middle grade after scanned by intensive MRI.Conclusion:The extremely high T 2WI signal intensity is the characteristic of MRI finding in chordomas and has great differential value for the tumors. The MRI is better than CT when used to reflect the location of chordoma, existence area and display the damage effect of bone.