Neonatal glycine encephalopathy

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Neonatal glycine encephalopathy

ORPHA:289857Clinical subtype

Also called Classic glycine encephalopathy · Neonatal NKH · Neonatal non-ketotic hyperglycinemia

What it is

Neonatal glycine encephalopathy is a frequent, usually severe form of glycine encephalopathy (GE) characterized by coma, apnea, hypotonia, seizure and myoclonic jerks in the neonatal period, and subsequent developmental delay.

Key facts

Age of onset
Infancy, Neonatal
Inheritance
Autosomal recessive
Classified as
Clinical subtype

Recorded for the broader condition

Prevalence
1-9 / 1 000 000 (Europe)Glycine encephalopathy

Orphanet records these for the broader condition rather than for this specific form. They are a starting point, not a figure for this subtype — subtypes often differ, and some are defined by being rarer than the condition they sit under.

Genes

AMTDisease-causing germline mutation(s) (loss of function)
GCSHDisease-causing germline mutation(s)
GLDCDisease-causing germline mutation(s)

ICD-10 codes

E72.5filed under a broader ICD-10 category — shared with 7 other rare diseases

ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.

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

MONDO 0017353OMIM 605899OMIM 620398OMIM 620423UMLS C5548200

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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