Vascular anomalies are disorders of the endothelium that usually present during childhood. These lesions affect all parts of the vasculature: capillaries, veins, arteries, or lymphatics. Although nearly always benign, vascular anomalies may involve any location. In addition to disfigurement, local complications include obstruction, bleeding, infection, and pain. Systemic sequelae can include thrombocytopenia, pulmonary embolism, congestive heart failure, sepsis, and even death.