raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:254857

Lethal infantile mitochondrial myopathy

Synonyms: LIMD · LIMM · Lethal infantile mitochondrial disease

Type
Disease
Group
Disorder
Inheritance
Mitochondrial inheritance
Age of onset
Infancy, Neonatal
Status
active

Lethal infantile mitochondrial myopathy is a rare mitochondrial oxidative phosphorylation disorder characterized by progressive generalized hypotonia, progressive external ophthalmoplegia and severe lactic acidosis, which results in early fatality (days to months after birth). Patients may present with lethargy and areflexia and may associate additional features, such as cardiomyopathy, renal dysfunction, liver involvement and seizures.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enLethal infantile mitochondrial myopathyLIMD · LIMM · Lethal infantile mitochondrial disease
frMyopathie mitochondriale létale infantileLIMD · Maladie mitochondriale létale infantile
deLetale mitochondriale Myopathie des KindesLIMD · LIMM · Mitochondriopathie, infantile letale
esMiopatía mitocondrial letal del lactanteEnfermedad mitocondrial letal del lactante · LIMD · LIMM
itMiopatia mitocondriale infantile letaleLIMD · Malattia mitocondriale infantile letale
nlLetale infantiele mitochondriale myopathieLIMD · LIMM · Letale infantiele mitochondriale ziekte
ptMiopatia mitocondrial da infância letalDoença mitocondrial da infância letal · LIMD
plŚmiertelna niemowlęca miopatia mitochondrialnaLIMD · LIMM · Śmiertelna niemowlęca choroba mitochondrialna
csDětská letální mitochondriální myopatieLIMD · Dětská letální mitochondriální porucha
ukЛетальна інфантильна мітохондріальна міопатіяЛетальна дитяча мітохондріальна хвороба · LIMD · LIMM
zh致命型婴儿线粒体肌病致命型婴儿线粒体疾病
trLetal infantil mitokondriyal miyopatiLIMD · LIMM · Letal infantil mitokondriyal hastalık

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM551000Evalidated
ICD-10G71.3NTBTattributedvalidated
ICD-118C73.YNTBTindexvalidated
MONDO0010792Evalidated
MeSHC564017Evalidated
UMLSC1838876Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

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Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (1):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
MT-TTCandidate gene tested inNot yet assessedHGNC:7499ENSG00000210195590090mitochondriamitochondrially encoded tRNA-Thr (ACN)1645537[PMID]
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Prevalence and incidence

0 records

No prevalence record in this release.

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HPO phenotypes

11 annotations · validated 2019-01-25
HPOTerm (as annotated by Orphanet)Diagnostic
Frequent (79-30%)
HP:0001638Cardiomyopathy
HP:0000590Progressive external ophthalmoplegia
HP:0000083Renal insufficiency
HP:0011344Severe global developmental delay
HP:0004900Severe lactic acidosis
Occasional (29-5%)
HP:0001284Areflexia
HP:0006583Fatal liver failure in infancy
HP:0008935Generalized neonatal hypotonia
HP:0001254Lethargy
HP:0002643Neonatal respiratory distress
HP:0001250Seizure

Annotation source: 11041514[PMID]_2549452[PMID]_1379415[PMID]_1645537[PMID]

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Sources for this card