Orphanet: Hyperammonemic encephalopathy due to carbonic anhydrase VA deficiency

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Hyperammonemic encephalopathy due to carbonic anhydrase VA deficiency

Disease definition

A rare, hereditary inborn error of metabolism characterized by an acute onset of encephalopathy in infancy or early childhood. Apart from these episodic acute events, the disorder shows a relatively benign course. Multiple metabolic abnormalities are present, including metabolic acidosis, respiratory alkalosis, hypoglycemia, increased serum lactate and alanine.


Classification level: Disorder
  • Synonym(s):
    • CA-VA deficiency
  • Prevalence: <1 / 1 000 000
  • Inheritance: Autosomal recessive 
  • Age of onset: Neonatal, Infancy, Childhood
  • ICD-10: E74.8
  • OMIM: 615751
  • UMLS: -
  • MeSH: -
  • GARD: -
  • MedDRA: -
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