The medical term for Klippel-Trenaunay syndrome is angio-osteohypertrophy syndrome.
Klippel-Trenaunay syndrome has three main characteristics: varicose veins, port-wine stains, and abnormal growth of soft tissues or bones. Soft tissues are the tissues located under the skin, around the organs and bones, or in the spaces between them. The diagnosis is made when at least two of the above-mentioned abnormalities are present in the same arm or leg. Other parts of the body may also be affected.
Children with this syndrome typically have two or more abnormalities in one or more limbs (arms or legs): varicose veins, port-wine stains, and abnormal growth of soft tissues and bones. The port-wine stain is often visible from birth. The varicose veins and abnormal growth usually develop later, often at a young age. The port-wine stain is most commonly located on an arm or leg, but it can also appear on the hip, abdomen, buttocks, shoulders, chest, or back.
Due to excessive growth, there may be a difference in length and/or thickness between the two legs or arms. It also occurs that children have more than ten fingers or toes (polydactyly) or that fingers or toes are fused together (syndactyly). The severity of symptoms varies from patient to patient.
Klippel-Trenaunay syndrome cannot be cured. However, the symptoms can be reduced through specific treatments. Laser therapy can help reduce the appearance of port-wine stains. Treating varicose veins in people with Klippel-Trenaunay syndrome is more challenging than in those with regular varicose veins. Therefore, compression stockings are usually the preferred option.
A difference in leg length can lead to posture problems and back pain, and is treated with a heel lift or surgery.
This syndrome is classified as a complex combined malformation because it involves a capillary-venous malformation, in which lymphatic vessels may also be involved (see ISSVA classification).
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National Organization for Rare Diseases USA
Bron: https://www.huidhuis.nl/huidaandoening/syndroom-van-klippel-trenaunay
