Abstract
Background and objective Mucopolysaccharidosis I (MPS I) is a rare, recessively inherited, lysosomal storage disorder caused by deficiency on the enzyme α-L-iduronidase. This defect results in accumulation of heparan and dermatan sulfate in different tissues and organs due to a deficiency in the catabolism of glycosaminoglycans. The overall incidence of MPS I is 0.99-1.99/100,000 live births. Enzyme replacement therapy (ERT) with recombinant α-L-iduronidase (laronidase) has shown to significantl improve the quality of life in children. To describe clinical characteristics, enzyme activity and genetic finding in the first Vietnamese patient with MPS type I with aldurazyme replacement therapy.
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