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Isolated succinate-CoQ reductase deficiency

Disease definition

A rare, mitochondrial oxidative phosphorylation disorder characterized by a highly variable phenotype. The severe, multisystemic disease involves brain, heart, muscles, liver, kidneys, and eyes and results in death in infancy. Mildly affected individuals have only isolated cardiac or muscle involvement in the adulthood. Histochemical and biochemical analysis reveals a global reduction of succinate dehydrogenase activity.


Classification level: Disorder
  • Synonym(s):
    • Isolated mitochondrial respiratory chain complex II deficiency
    • Isolated succinate dehydrogenase deficiency
    • Isolated succinate-coenzyme Q reductase deficiency
    • Isolated succinate-ubiquinone reductase deficiency
  • Prevalence: <1 / 1 000 000
  • Inheritance: Autosomal recessive 
  • Age of onset: Neonatal, Infancy
  • ICD-10: G71.3
  • OMIM: 252011
  • UMLS: C1855008
  • MeSH: -
  • GARD: 5053
  • MedDRA: -
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