Hurler synrome, also known as mucopolysaccharidosis type I (MPS I), Hurler's disease or gargoylism, is a genetic disorder that results in the buildup of mucopolysaccharides due to a deficiency of alpha-L iduronidase, an enzyme responsible for the degradation of mucopolysaccharides in lysosomes. Without this enzyme, a buildup of heparan sulfate and dermatan sulfate occurs in the body. Symptoms appear during childhood and early death can occur due to organ damage.