raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:369897

Mitochondrial DNA depletion syndrome, encephalomyopathic form with variable craniofacial anomalies

Synonyms: mtDNA depletion syndrome, encephalomyopathic form with variable craniofacial anomalies

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Infancy, Neonatal
Status
active

A rare mitochondrial DNA depletion syndrome characterized by congenital or early-onset lactic acidosis, hypotonia, and severe global developmental delay with feeding difficulties and failure to thrive. It is frequently associated with variable dysmorphic facial features. Additional manifestations include seizures, movement disorders, and cardiac and ophthalmologic anomalies, among others. Brain imaging may show generalized atrophy and white matter abnormalities.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enMitochondrial DNA depletion syndrome, encephalomyopathic form with variable craniofacial anomaliesmtDNA depletion syndrome, encephalomyopathic form with variable craniofacial anomalies
frSyndrome de déplétion de l'ADN mitochondrial, forme encéphalomyopathique avec anomalies craniofaciales variablesSyndrome de déplétion de l'ADNmt, forme encéphalomyopathique avec anomalies craniofaciales variables
deMitochondriales DNA-Depletionssyndrom, enzephalomyopathische Form mit variablen kraniofazialen AnomalienmtDNA-Depletionssyndrom, enzephalomyopathische Form mit variablen kraniofazialen Anomalien
esSíndrome de depleción del ADN mitocondrial, forma encefalomiopática con anomalías craneofaciales variablesSíndrome de depleción del ADNmt, forma encefalomiopática con anomalías craneofaciales variables
itSindrome da deplezione del DNA mitocondriale, forma encefalomiopatica con anomalie craniofacciali variabiliSindrome da deplezione del mtDNA , forma encefalomiopatica con anomalie craniofacciali variabili
nlMitochondriaal DNA-depletiesyndroom, encefalomyopathische vorm met variabele craniofaciale anomalieënmtDNA-depletiesyndroom, encefalomyopathische vorm met variabele craniofaciale anomalieën
ptSíndrome de depleção do ADN mitocondrial, forma encefalomiopática com anomalias craniofaciais variáveisSíndrome de depleção do ADNmt, forma encefalomiopática com anomalias craniofaciais variáveis
plZespół deplecji mitochondrialnego DNA, postać encefalomiopatyczna ze zróżnicowanymi wadami twarzoczaszkiZespół deplecji mtDNA, postać encefalomiopatyczna ze zróżnicowanymi wadami twarzoczaszki
csSyndrom deplece mitochondriální DNA, encefalomyopatická forma s variabilními kraniofaciálními anomáliemiSyndrom deplece mtDNA, encefalomyopatická forma s variabilními kraniofaciálními anomáliemi
ukСиндром виснаження мітохондріальної ДНК, енцефаломіопатична форма з варіабельними черепно-лицьовими аномаліямиСиндром виснаження мтДНК, енцефаломіопатична форма з варіабельними черепно-лицьовими аномаліями
zh线粒体DNA耗竭综合征脑肌病型伴多种颅面异常mtDNA耗竭综合征伴脑肌病型伴多种颅面异常
trMitokondriyal DNA tükenme sendromu, çeşitli kraniyofasiyal anomaliler ile seyreden ensefalomiyopatik formDeğişken kraniyofasyal anomaliler ile seyreden mtDNA deplesyon sendromu, ensefalomyopatik form

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM615471Evalidated
ICD-10E88.8NTBTattributedvalidated
ICD-115C53.20NTBTattributedvalidated
MONDO0014198Evalidated
UMLSC5679913Evalidated
GARD13298Evalidated

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

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
FBXL4Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:13601ENSG000001122346056546q16.1-q16.2F-box and leucine rich repeat protein 423993193[PMID]_23993194[PMID]
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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families20 casesWorldwideCase(s)Validated23993193[PMID]_23993194[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

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

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Sources for this card