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Causes

By Mayo Clinic staff

A hemangioma consists of an abnormally dense group of extra blood vessels. It's not clear what causes the blood vessels to group together, although some research suggests a link between hemangiomas and certain proteins produced by the placenta during pregnancy.

Risk factors Symptoms
References
  1. What is a vascular birthmark? American Academy of Dermatology. http://www.aad.org/public/publications/pamphlets/common_vascular.html. Accessed July 12, 2010.
  2. Metry DW. Epidemiology; pathogenesis; clinical features; and complications of infantile hemangiomas. http://www.uptodate.com/home/index.html. Accessed July 7, 2010.
  3. Metry DW. Management of infantile hemangiomas. http://www.uptodate.com/home/index.html. Accessed July 7, 2010.
DS00848 Sept. 21, 2010

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