Port wine stains are birthmarks that are due to congenital malformation
of the veins and capillaries of the skin. Present at birth, they
affect 0.3 to 0.5% of the population and can have significant
psychological implications on the affected individual, especially if
facial areas area affected. Port wine stains commonly occur on the
face, but can occur anywhere on the body, and often affect large
surface areas.
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Learn more about Port Wine Stains