Klippel-Trenaunay syndrome
A PWS on the limbs can be attributed to Klippel-Trenaunay syndrome, which can result in asymmetrical arms or legs due to excessive growth of bone and soft tissue (hypertrophy) and typically affects only one side of the body. The overgrowth may not be present at birth and may only be noticed after a few months or years. A CAT scan, an MRI or color Doppler can help determine the scope of the syndrome and how best to manage it.