Mucopolysaccharidosis, Type Iiid, also known as mucopolysaccharidosis type iiid, is related to mucopolysaccharidoses and mucopolysaccharidosis-plus syndrome, and has symptoms including diarrhea, seizures and joint stiffness. An important gene associated with Mucopolysaccharidosis, Type Iiid is GNS (Glucosamine (N-Acetyl)-6-Sulfatase), and among its related pathways/superpathways are Infectious disease and Metabolism. Affiliated tissues include spinal cord and eye, and related phenotypes are macrocephaly and frontal bossing