Abstract
Objectives: Mucopolysaccharidosis type VII (MPS VII) or Sly syndrome is a rare autosomal recessive disorder caused by deficiency of β-glucuronidase enzyme, which is involved in degradation of glycosaminoglycans. The lack of β-glucuronidase in this lysosomal storage disorder is characterized by various manifestations such as nonimmune hydrops fetalis, spinal deformity, organomegaly, dysostosis multiplex, intellectual disability, and eye involvement. It is caused by a mutation in GUSB gene located on chromosome 7 q11. The current study reported an Iranian female with MPS VII and a novel mutation (c.542G>T, p.Arg181Leu) in GUSB gene.
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