Nagy et al. reported the presence of six morphologically and functionally distinct tumor vessel subtypes including mother vessels, capillaries, glomeruloid microvascular proliferations, vascular malformations, feeder arteries, and draining veins; of which two of the vessel forms were capable of surviving in the absence of exogenous VEGF-A (Nagy et al. 2009). Here, VEGFA is linked to neoplasm.