Klippel-Trenaunay-Weber syndrome (KTWS) is an uncommon disorder in which asymmetrical enlargement (hypertrophy) of a limb or limbs and hemangiomas (blood vessel malformations) are the most consistent features. Hemangiomas are found most frequently on the skin but may occur in several other areas.
A uncommon condition typically impacting a limb, where a significant abnormality in blood vessels, encompassing both arteries and veins, results in the enlargement of the affected region.