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Hyperactivity, unexplained speech delay, and coarse facies--is it Sanfilippo syndrome?


, : Hyperactivity, unexplained speech delay, and coarse facies--is it Sanfilippo syndrome?. Journal of Child Neurology 29(8): Np9-N12

Mucopolysaccharidosis-IIIB or Sanfilippo-B syndrome is caused by deficiency of lysosomal α-N-acetylglucosaminidase that leads to accumulation of heparan-sulphate and degeneration of central nervous system with progressive dementia, hyperactivity, and aggressive behavior. Mucopolysaccharidosis-III remains underdiagnosed as a cause of developmental delay and hyperactivity both in adults and children because in contrast to other mucopolysaccharidoses, they have little somatic disease, coarse facial features, hepatosplenomegaly or skeletal changes, and a high incidence of false-negative results on the urinary screening tests. We describe here a girl with the classic phenotype of mucopolysaccharidosis-IIIB to alert pediatricians to the possibility of this disorder in children with unexplained speech delay and hyperactivity and prevent unnecessary investigations.

US$19.90

PMID: 23761035

DOI: 10.1177/0883073813491627


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