raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:79243

Pyruvate dehydrogenase E1-alpha deficiency

Synonyms: PDHAD · Pyruvate decarboxylase deficiency · Pyruvate dehydrogenase complex E1 component subunit alpha deficiency

Type
Clinical subtype
Group
Subtype of disorder
Inheritance
X-linked dominant
Age of onset
Infancy, Neonatal
Status
active

A disorder that is the most frequent form of pyruvate dehydrogenase deficiency (PDHD) characterized by variable lactic acidosis, impaired psychomotor development, hypotonia and neurological dysfunction.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enPyruvate dehydrogenase E1-alpha deficiencyPDHAD · Pyruvate decarboxylase deficiency · Pyruvate dehydrogenase complex E1 component subunit alpha deficiency
frDéficit en pyruvate déshydrogénase E1-alphaDéficit en pyruvate décarboxylase · Déficit en sous-unité E1 alpha du complexe pyruvate déshydrogénase · PDHAD
dePyruvat-Dehydrogenase E1-alpha-MangelE1-alpha-Untereinheit-Mangel des PDH-Komplex · PDHAD · Pyruvat-Decarboxylase-Mangel
esDeficiencia de piruvato deshidrogenasa E1-alfaDeficiencia de piruvato descarboxilasa · Deficiencia de subunidad E1 alfa del complejo piruvato deshidrogenasa · PDHAD
itDeficit di E1-alfa della piruvato deidrogenasiDeficit della piruvato decarbossilasi · Deficit della subunità alfa della componente E1 della piruvato deidrogenasi · PDHAD
nlPyruvaatdehydrogenase E1-alfa-deficiëntieDeficiëntie van component E1-alfa van het pyruvaatdehydrogenasecomplex · PDHAD · Pyruvaatdecarboxylasedeficiëntie
ptDeficiência de piruvato desidrogenase E1-alfaDeficiência de E1
plNiedobór dehydrogenazy pirogronianowej E1-alfaNiedobór dehydrogenazy pirogronianowej · Niedobór dehydrogenazy pirogronianowej kompleksu E1 komponentu podjednostki alfa · PDHAD
csDeficit pyruvátdehydrogenázy E1-alfaPDHAD · Deficit pyruvát dekarboxylázy · Deficit alfa podjednotky E1 komponenty pyruvát dehydrogenázového komplexu
ukДефіцит піруватдегідрогенази Е1-альфаPDHAD · Дефіцит піруватдекарбоксилази · Дефіцит альфа-субодиниці комплексу піруватдегідрогенази Е1
zh丙酮酸脱氢酶E1-α缺陷症丙酮酸脱氢酶复合物E1组分亚基α缺乏症
trPirüvat dehidrojenaz E1-alfa eksikliğiPDHAD · Piruvat dekarboksilaz eksikliği · Piruvat dehidrojenaz kompleksi E1 bileşeni alt birim alfa eksikliği

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM312170Evalidated
ICD-10E74.4NTBTattributedvalidated
ICD-115C53.02NTBTindexvalidated
MONDO0010717Evalidated
MeSHC564071Evalidated
UMLSC1839413Evalidated
GARD4620Evalidated

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
LONP1Disease-causing germline mutation(s) inAssessedHGNC:9479ENSG0000019636560549019p13.2lon peptidase 1, mitochondrial30304514[PMID]
PDHA1Disease-causing germline mutation(s) inAssessedHGNC:8806ENSG00000131828300502Xp22.12pyruvate dehydrogenase E1 subunit alpha 110679936[PMID]_15384102[PMID]_20002461[PMID]
5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass onlyNot yet validatedORPHANET

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

55 annotations · validated 2020-10-08
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0500231Abnormal CSF pyruvate family amino acid concentration
HP:0002490Increased CSF lactate
HP:0002151Increased circulating lactate concentration
HP:0001518Small for gestational age
Frequent (79-30%)
HP:0001999Abnormal facial shape
HP:0012443Abnormality of brain morphology
HP:0025361Abnormality of medullary pyramid morphology
HP:0000707Abnormality of the nervous system
HP:0002069Bilateral tonic-clonic seizure
HP:0002059Cerebral atrophy
HP:0004902Congenital lactic acidosis
HP:0011196EEG with focal sharp waves
HP:0011193EEG with focal spikes
HP:0011199EEG with generalized sharp slow waves
HP:0002171Gliosis
HP:0003542Increased circulating pyruvate concentration
HP:0002187Intellectual disability, profound
HP:0001511Intrauterine growth retardation
HP:0003128Lactic acidosis
HP:0006956Lateral ventricle dilatation
HP:0030917Low APGAR score
HP:0001250Seizure
HP:0002119Ventriculomegaly
Occasional (29-5%)
HP:0001274Agenesis of corpus callosum
HP:0001251Ataxia
HP:0006799Basal ganglia cysts
HP:0006999Basal ganglia gliosis
HP:0012128Basal ganglia necrosis
HP:0000618Blindness
HP:0002350Cerebellar cyst
HP:0012698Cerebellar gliosis
HP:0002329Drowsiness
HP:0001332Dystonia
HP:0011968Feeding difficulties
HP:0001371Flexion contracture
HP:0002020Gastroesophageal reflux
HP:0011471Gastrostomy tube feeding in infancy
HP:0002079Hypoplasia of the corpus callosum
HP:0001252Hypotonia
HP:0002521Hypsarrhythmia
HP:0002540Inability to walk
HP:0012469Infantile spasms
HP:0010576Intracranial cystic lesion
HP:0009826Limb undergrowth
HP:0000252Microcephaly
HP:0002643Neonatal respiratory distress
HP:0001338Partial agenesis of the corpus callosum
HP:0006970Periventricular leukomalacia
HP:0001761Pes cavus
HP:0002126Polymicrogyria
HP:0002100Recurrent aspiration pneumonia
HP:0002719Recurrent infections
HP:0000954Single transverse palmar crease
HP:0001883Talipes
HP:0001629Ventricular septal defect

Run the differential on the 4 obligate / very frequent terms

Annotation source: 1528021[PMID]_28584645[PMID]

7

Sources for this card