Mixture of blood vessels separated by connective tissue and fat. The size of blood vessel lumens varies. Some may have thick wall composed of connective tissue and smooth muscle (van Gieson, smooth muscle actin), corresponding to arteries and veins. Staining for elastic tissue will show lamina elastica interna in arteioles; both arteries and veins usually have variable amount of elastic fibres within outer layers of their walls. Capillaries are often crowded and resemble capillary hemangioma closely. These areas may show proliferation with mitotic activity and sometimes resemble Kaposi's sarcoma (pseudo-Kaposi's sarcoma, but this term is used for irregular vascular proliferation caused by stasis in lower extremities as well); hemosiderin deposits may be present as well.