raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:716917

Congenital myasthenic syndrome with mitochondrial defect

Synonyms: CMS with mitochondrial defect

Type
Etiological subtype
Group
Subtype of disorder
Inheritance
Autosomal recessive
Status
active

Orphadata ships no English definition for this code.

1

Names in Orphadata languages

9 of 12 languages
LangNameSynonyms
enCongenital myasthenic syndrome with mitochondrial defectCMS with mitochondrial defect
frSyndrome myasthénique congénital par défaut mitochondrialSMC par défaut mitochondrial
deKongenitales Myastheniesyndrom mit mitochondrialem DefektCMS mit Mitochondriendefekt
esSíndrome miasténico congénito con defectos mitocondrialesSMC con defectos mitocondriales
itSindrome miastenica congenita con difetto mitocondrialeSMC con difetto mitocondriale · CMS con difetto mitocondriale
nlCongenitaal myastheen syndroom met mitochondriaal defectCMS met mitochondriaal defect
ptCongenital myasthenic syndromes with mitochondrial defect
plWrodzone zespoły miasteniczne z defektem mitochondrialnym= en
csCongenital myasthenic syndrome with mitochondrial defect= en
2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM618197BTNTvalidated
OMIM620451BTNTvalidated

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

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (1):

No children.

4

Genes

2 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
SLC25A1Disease-causing germline mutation(s) inAssessedHGNC:10979ENSG0000010007519031522q11.21solute carrier family 25 member 1
TEFMDisease-causing germline mutation(s) inAssessedHGNC:26223ENSG0000017217161642217q11.2transcription elongation factor, mitochondrial37239850[PMID]_36823193[PMID]
5

Prevalence and incidence

0 records

No prevalence record in this release.

6

HPO phenotypes

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card