capillary hemangioma, a blood-filled birthmark or benign tumor consisting of closely packed small blood vessels. Commonly found during infancy, it first grows, then may spontaneously disappear in early childhood without treatment. Surgical removal is not usually attempted unless frequent trauma and bleeding are present. However, surgery may be performed later for cosmetic reasons. Also called hemangioma simplex, strawberry hemangioma, strawberry mark, nevus vascularis. Compare cavernous hemangioma, nevus flammeus.