Klippel-Trenaunay-Weber Syndrome. Klippel-Trenaunay-Weber syndrome (KTWS) is characterized by a triad of port-wine stain, varicose veins, and bony and soft ...
Angiokeratoma Circumscriptum. Angiokeratomas are a group of vascular ectasias that involve the papillary dermis and may produce papillomatosis, acanthosis, ...
... in early infancy, followed by involution over time; all other abnormalities are malformations resulting from anomalous development of vascular plexuses.