<unk>  hemangioma, H&E stain<unk> s are made up of clusters of capillaries at the surface of the skin, forming a small round dome ("papule"), which may be flat topped . They range in colour from bright red to purple. When they first develop, they may be only a tenth of a millimeter in diameter and almost flat, appearing as small red dots. However, they then usually grow to about one or two millimeters across, and sometimes to a centimeter or more in diameter . As they grow larger, they tend to expand in thickness, and may take on the raised and rounded shape of a dome. Multiple adjoining angiomas form a polypoid angioma. Because the blood vessels comprising an angioma are so close to the skin's surface,<unk> s may bleed profusely if they are injured. One study found that the majority of capillaries in<unk>  hemangiomas are fenestrated and stain for carbonic anhydrase activity.
Cherry angioma
Spider angioma
Angiokeratoma
Tufted angioma
Lymphohemangioma
Chorangioma
Chorioangioma
Universal angiomatosis