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Klippel-Trenaunay (K-T) Syndrome is characterized by a localized or diffuse capillary malformation that overlies a venous malformation and/or lymphatic malformation with associated soft tissue and bone overgrowth (hypertrophy). The capillary malformation is typically substantial, varicose veins are often quite numerous, and bone and soft tissue hypertrophy are variable. The affected limb is either larger or smaller than the unaffected limb. Hypertrophy occurs most commonly in the lower limbs but may affect the arms, the face, the head, or internal organs. Additionally, a wide range of other skeletal and skin abnormalities sometimes coexists. (K-T Support Group)