目的研究血管内皮生长因子(VEGF)表达与人脑转移瘤瘤周脑水肿(PTBE)的关系。

Objective to investigate the expression of vascular endothelial growth factor (VEGF) and its relationship with peritumoral brain edema (PTBE) in brain metastases.

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结果：脊索瘤的低场MRI的主要表现有： 肿瘤信号变化，肿瘤形态改变，骨质破坏，周围血管侵蚀及肿瘤外周侵犯等。

Results: The chief characteristics of chordoma in low field MRI were: tumor signal change, tumor shape transformation, bone destruction, the perivascular erosion , etc.

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瘤体及瘤周水肿区毛细血管超微结构均有不同程度的改变。

The tumor body and PTBE all have a different change in capillary ultrastructure.

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