Abstract

目的 初步探讨原始神经外胚层肿瘤(PNET)的动态增强MRI表现,以及对其诊断及鉴别诊断的价值.方法用动态增强MRI方法对已手术和病理证实的2例胸椎PNET行3次MR检查并进行前瞻性研究.结果在信号强度-时间和对比增强率-时间曲线上,2例PNET 3次检查均表现为快升慢降型,即肿瘤早期就开始迅速增强,上升峰极陡,60~120 s即达到高峰水平,然后保持平坦,3.5 min内未见明显下降曲线.结论动态增强MRI扫描能帮助对PNET进行早期诊断和鉴别诊断,从而为临床选择治疗方案及估计预后提供较为可靠的依据。

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