The growth,infiltration and metastasis of oncoma depend on tumor angiogenesis.Vascular endothelial growth factor(VEGF)is the most important irritant factor of angiogenesis.
Vascular endothelial growth factor(VEGF) is also named as vascular permeability factor(VPF),which is a powerful angiogenesis and vascular diosmosis promoter discovered at present.
Finally, endothelial injury increases vascular permeability, allowing water to slip out of blood vessels between neighboring endothelial cells and get into the tissues.
Now, regardless of type, Kaposi's sarcoma is an endothelial cell neoplasm, so it causes vascular proliferation, resulting in dark or violaceous plaques.
This respiratory surface, also known as the respiratory membrane, includes the alveolar epithelial cells as well as the pulmonary capillary endothelial cells.
The innermost tunic is called the tunica intima, which includes the endothelial cells, which create a slick surface that minimizes friction for blood moving through it.