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Mitochondrial myopathy-lactic acidosis-deafness syndrome

Disease definition

A rare metabolic myopathy presenting during childhood, and characterized clinically by growth failure, severe muscle weakness, and moderate sensorineural deafness and biochemically by metabolic acidosis, elevated serum pyruvate concentration, hyperalaninemia and hyperalaninuria. There have been no further descriptions in the literature since 1973.


Classification level: Disorder
  • Synonym(s):
    • Mitochondrial myopathy-lactic acidosis-hearing loss syndrome
  • Prevalence: <1 / 1 000 000
  • Inheritance: No data available 
  • Age of onset: Childhood
  • ICD-10: G71.3
  • OMIM: 251950
  • UMLS: C1855033
  • MeSH: C537476
  • GARD: 3682
  • MedDRA: -
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