Angioma or haemangioma is a benign (non-cancerous) overgrowth of blood vessels in the skin. Angiomas are due to proliferating endothelial cells; these are the cells that line blood vessels.
Acquired angiomas include:
Spider angioma (spider naevus)
Cherry angiomas may develop on any part of the body but they appear most often around the midtrunk. They can be red, blue, purple, or almost black. Cherry angiomas increase in number from about the age of 40. Their cause is unknown.
Spider angiomas (spider naevi)
Spider angiomas or spider naevi are common on the face and upper chest. They are given that name because they have a central red papule with feeding capillary legs. They are sometimes known as naevus araneus.
Spider angiomas may be seen in children and adults. They are more numerous in the presence of extra oestrogen, for example in pregnancy, or when liver function is poor.
Angiomas on the lip are known as venous lakes. They are usually bluish in colour, but may also be red or purple.