A congenital vascular bone syndrome (CVBS) characterized by the presence of a vascular malformation in a limb, mainly of the arteriovenous type, which results in overgrowth of the affected limb. The disease is MONDO_0007864 (angioosteohypertrophic syndrome). Also known as: Klippel Trenaunay syndrome, Klippel-Trenaunay Syndrome, Klippel-Trenaunay syndrome, Klippel-Trenaunay-Weber syndrome, Klippel-Trenaunay-Weber syndrome, Isolated cases, Klippel-Trénaunay syndrome, Klippel-Trénaunay-Weber syndrome, Weber-Klippel-Trenaunay.