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Disease definition

A rare congenital disorder of glycosylation caused by mutations in the CAD gene and characterized by epileptic encephalopathy, global developmental delay, normocytic anemia and anisopoikilocytosis. Loss of acquired skills in early childhood is present and natural disease course can be lethal in early childhood.


Classification level: Disorder
  • Synonym(s):
    • CDG syndrome type Iz
    • CDG-Iz
    • CDG1Z
    • Carbohydrate deficient glycoprotein syndrome type Iz
    • Congenital disorder of glycosylation type 1z
  • Prevalence: <1 / 1 000 000
  • Inheritance: Autosomal recessive 
  • Age of onset: Infancy
  • ICD-10: E77.8
  • ICD-11: 5C54.2
  • OMIM: 616457
  • UMLS: C4225320
  • MeSH: -
  • GARD: -
  • MedDRA: -
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