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Glycogen storage disease due to acid maltase deficiency

Disease definition

A rare lysosomal storage disease characterized by lysosomal accumulation of glycogen particularly in skeletal, cardiac, and respiratory muscles, as well as the liver and nervous system, due to acid maltase deficiency. The clinical spectrum comprises infantile-onset disease with severe hypertrophic cardiomyopathy, generalized muscle weakness, poor feeding and failure to thrive, and respiratory insufficiency, and late-onset disease manifesting before or after twelve months of age without cardiomyopathy, with proximal muscle weakness and respiratory insufficiency.


Classification level: Disorder
  • Synonym(s):
    • Alpha-1,4-glucosidase acid deficiency
    • GSD due to acid maltase deficiency
    • GSD type 2
    • GSD type II
    • Glycogen storage disease type 2
    • Glycogen storage disease type II
    • Glycogenosis due to acid maltase deficiency
    • Glycogenosis type 2
    • Glycogenosis type II
    • Pompe disease
  • Prevalence: 1-9 / 100 000
  • Inheritance: Autosomal recessive 
  • Age of onset: Antenatal, Neonatal, Infancy, Childhood, Adolescent, Adult
  • ICD-10: E74.0
  • ICD-11: 5C51.3
  • OMIM: 232300
  • UMLS: C0017921
  • MeSH: D006009
  • GARD: 5714
  • MedDRA: 10053185

Detailed information

General public


Disease review articles

Clinical Outcome Assessment (COA)

  • Patient-Centered Outcome Measures (PCOMs)
  • English (2023) - PROQOLIDTM

Genetic Testing

ERN produced/endorsed by ERN(s)   FSMR produced/endorsed by FSMR(s)
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