脊索瘤的磁共振成像诊断及鉴别诊断

目的 探讨脊索瘤的磁共振成像(MRI)特征,提高其诊断的准确性.方法 对15例经病理证实的脊索瘤MRI影像进行分析及总结,分析病变的发生部位、形态、大小、边缘、信号等影像学特征.结果 斜坡、骶尾椎、颈部3个部位的MRI表现在T1加权图像呈低信号,其间部分可夹杂多个斑点状的高信号,系出血及黏液变所致；在T2加权像上均呈不均匀高信号.结论 CT在显示骨质破坏及钙化上有优势,但是在显示脊索瘤方面MRI具有多方位成像、无骨骼伪影的特点,肿瘤及比邻组织的显示更为优越,有利于临床诊断及拟定治疗方案.

The diagnosis and differential diagnosis of chordoma in MRI

Objective To explore the MRI characteristics of chordoma, improve its diagnostic accuracy. Methods The MRI image of 15 cases with chordoma confirmed by pathology were analyzed and summarized, evaluation the imaging features of the lesions including location, shape, size, edge states, signal,et ah Results The chordoma located slope, sacral, neck showed low signal intensity on T1 weighted image, some were mixed with multiple punetate high signal （induced by bleeding and mucinous lesions）; on T2 weighted images were non-uniform high signal. Conclusion It has advantage for CT to show bone destruction and calcification, but due to muhidirectional imaging and without bone artifacts interference of MRI , tumor and surrounding tissues are shown to be more excellent, and it is more conducive to the formulation of clinical treatment scheme.