Stiff skin syndrome (SSS) is an autosomal dominant congenital form of scleroderma characterized by stony-hard skin, limitation of joint mobility, and mild hypertrichosis, remarkable in the areas with abundant fascia on the thighs and buttocks. SSS is caused by mutations in the Arg-Gly-Asp (RGD) sequence-encoding domain of fibrillin-1 that mediates integrin binding.