When the ovarian and gastric cancer cells colonizes the peritoneum and grows to a certain size, VEGF will play a significate role in increasing the formation of new blood vessels by stimulating the proliferation and migration of endothelial cells, enhancing vascular permeability, and inhibiting the apoptosis of endothelial cells to provide the nutrients needed for tumor growth (142, 144). The gene discussed is VEGFA; the disease is gastric cancer.