Article révisé par les pairs
Résumé : A mucopolysaccharidosis is diagnosed in an infant aged 3 months. Clinical and X‐ray data are not typical, while biological studies reveal an increased mucopolysacchariduria affecting both heparan and dermatan sulfate. Study of lysosomal hydrolases in the liver discloses a normal activity of β‐galactosidase. Hepatic ultrastructure shows, in both parenchymal and Kupffer cells, the presence of clear inclusions analoguous to those found in typical mucopolysaccharidoses, although more numerous and generally smaller. Copyright © 1971, Wiley Blackwell. All rights reserved