And because this tumor created a lot of neovascularization, where it literally released these factors called endothelial growth factors, it created its own blood supply.

因为这种肿瘤产生了大量的新血管，它实际上释放了这些称为内皮生长因子的因子，它创造了自己的血液供应。

Now, the sudden gush of blood through the collateral vessel stretches its walls and deforms the endothelial cells, which stimulates the production of growth factors like the vascular endothelial growth factor, or VEGF, from the vessel wall.

现在，一股血流突然涌入侧支血管，牵拉血管壁使内皮细胞变形，刺激血管壁产生生长因子，如血管内皮生长因子（VEGF）。