Mucopolysaccharidosis type 4A

Mucopolysaccharidoses are a group of metabolic disorders caused by the absence or malfunctioning of lysosomal enzymes needed to break down molecules called glycosaminoglycans (GAGs). These long chains of sugar carbohydrates occur within the cells that help build bone, cartilage, tendons, corneas, skin and connective tissue. [Source: Wikipedia ]

Galactosamine-6-sulfatase deficiency
Morquio syndrome type A
OrphaNet reference
Mucopolysaccharidosis type 4A 
Is A
Morquio syndrome
May Cause
Irregular epiphysis
Joint laxity
Sclerotic epiphysis
Small acetabular angle