Severe neonatal lactic acidosis

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Severe neonatal lactic acidosis due to NFS1-ISD11 complex deficiency

ORPHA:397593Disease

What it is

Severe neonatal lactic acidosis due to NFS1-ISD11 complex deficiency is a rare, hereditary, mitochondrial oxidative phosphorylation disorder characterized by severe neonatal lactic acidosis and deficiency of mitochondrial complexes I, II and III. Clinical features are variable and may include hypotonia, respiratory distress with cyanosis, failure to thrive, feeding difficulties, hypoglycemia, dehydration, vomiting, seizures, and a risk of multiple organ failure.

Key facts

Prevalence
<1 / 1 000 000
Age of onset
Neonatal
Inheritance
Autosomal recessive
Classified as
Disease

Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.

Genes

LYRM4Disease-causing germline mutation(s)
NFS1Disease-causing germline mutation(s)

ICD-10 codes

E87.2filed under a broader ICD-10 category

Related health topics

Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.

Cross-references

OMIM 615595OMIM 619386UMLS C4750855

Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.

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