In mucopolysaccharidosis type IVA (MPS IVA, Morquio disease A, deficiency of the enzyme Acetylgalactosamine-6-Sulfatase) and type IVB (MPS IVB, Morquio disease B, deficiency of Beta-Galactosidase) predominantly the skeletal system is affected: Severe deformities of the spine, thorax and extremities result in disproportionate short stature, in severe cases the final height is about 120 cm. However, patients with a normal height have been described, too. Further characteristic features include joint laxity, instability oft the cranio-cervical junction, leading to paraplegia, corneal clouding and hearing problems. The intelligence is normal.
Synonym: Morquio A syndrome
Etiology: Deficiency of N-acetyl-galactosamin-6-sulfate-sulfatase
Gene: GALNS Gene
Mode of inheritance: Autosomal recessive
Elosulfase alfa (Vimizim®)
Gesellschaft für Mukopolysaccharidosen e.V.
At the moment we are not aware of any self-help groups.
At present we have no literature available.