Klippel-Trénaunay-Weber Syndrome or KTS is a rare congenital medical condition in which blood vessels and/or lymph vessels fail to form properly.

Diagnosis

• One or more distinctive port-wine stains with sharp borders^{[citation needed]}
• Varicose veins
• Hypertrophy of bony and soft tissues, that may lead to local gigantism or shrinking.
• An improperly developed lymph system

KTS is a complex syndrome, and no single treatment is applicable for everyone. Treatment is decided on a case-by-case basis with the individual's doctors.

At present, many of the symptoms may be treated, but there is no cure for Klippel-Trenaunay Syndrome.