# Capillary Malformation (CM)

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Capillary malformation (CM) is a common vascular birthmark also known as a “port-wine” stain because of the pink/red/purple discoloration of the skin, consists of small blood vessels (capillaries) in the skin. They usually occur on the face, but may appear elsewhere on the body, and often become darker with age. Since they don’t reach very deeply below the surface of the skin, CM can often be effectively treated by laser photocoagulation.  CMs can be associated with over growth of soft tissue and bone, as well as with syndromes.