Valayannopoulos et al. Orphanet Journal of Rare Diseases 2010, 5:5

The first is a child who has MPS 1, mucopolysaccharidosis type 1, and you see those features that I just described. Second is a child with MPS 2. They look similar but not quite the same. Third is a child with MPS 6 and lastly is a child with mucolipidosis type 2. They are all dysmorphic, they have this coarseness in their face, but they do not all look alike.