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目的：探索幕上胶质瘤瘤周水肿的ＭＲＩ特征。方法：对７６例幕上胶质瘤的磁共振增强前、后图像进行研究，所有病例均经手术和病理证实。结果：ＭＲＩ幕上胶质瘤瘤周水肿播散方式与脑白质的分布规律密切相关。统计数据表明，Ｔ２Ｗ图像瘤周水肿与正常组织之间（Ｐ＜０．００１），及增强后Ｔ１Ｗ图像瘤周水肿与瘤体实质之间（Ｐ＜０．００５）信号强度差异有显著意义。结论：ＭＲＩ对显示幕上胶质瘤瘤周水肿全貌极有帮助。
Objective: To explore the MRI features of peritumoral edema of supratentorial glioma. METHODS: The pre- and post-MRI images of 76 cases of supratentorial glioma were studied. All cases were confirmed by surgery and pathology. Results: The distribution of peritumoral edema on the MRI of glioma was closely related to the distribution of white matter. Statistical data showed that there was a significant difference in signal intensity between the peritumoral edema of T2W images and normal tissues (P<0.001), and between enhanced peritumoral edema and tumor parenchyma (P<0.005). Conclusion: MRI is very helpful for the overall appearance of peritumoral edema on supratentorial gliomas.