(3) For MPS IVA, there were 12 novel mutants in the GALNS gene, including c.131G>T [p.G44V], c.190_191delinsAT [p.A64I], c.374C>T [p.P125L], c.638C>T [p.A213V], c.706C>T [p.H236Y], c.782T>C [p.I261T], c.857C>T [p.T286M], c.887C>T [p.A296V], c.953T>G [p.M318R], c.985C>A [p.H329N], c.1108C>T [p.P370S], and c.1496C>T [p.P499L]. Here, GALNS is linked to mucopolysaccharidosis type 4A.