Mucopolysaccharidosis IVA, or Morquio A syndrome, is caused by defects in the enzyme N-acetylgalactosamine-6-sulfate sulfatase (GALNS), leading to abnormal accumulation of keratansulfate (KS) and chondroitin-6-sulfate (C6S) in multiple tissues, mainly bone, cartilage, heart valves, and cornea [1]. This evidence concerns the gene GALNS and mucopolysaccharidosis type 4A.