raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:30

Hereditary orotic aciduria

Synonyms: Orotidylic decarboxylase deficiency · Uridine monophosphate synthetase deficiency

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

A rare genetic disorder of pyrimidine metabolism characterized by early onset of megaloblastic anemia, global developmental delay, and failure to thrive, associated with massive urinary overexcretion of orotic acid (sometimes with orotic acid crystalluria). Patients without megaloblastic anemia, but with additional manifestations such as epilepsy, have also been reported.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enHereditary orotic aciduriaOrotidylic decarboxylase deficiency · Uridine monophosphate synthetase deficiency
frAcidurie orotique héréditaireDéficit en décarboxylase orotidylique · Déficit en uridine monophosphate synthase · Oroticacidurie
deOrotazidurie, hereditäreOrotidyl-Dekarboxylase-Mangel · Uridin-Monophosphat-Synthase-Mangel
esAciduria orótica hereditariaDeficiencia de orotidílico decarboxilasa · Deficiencia de uridina monofosfato sintetasa
itAciduria orotica ereditariaDeficit di orotidilico decarbossilasi · Deficit di uridina-monofosfato sintasi · Oroticaciduria
nlErfelijke orootacidurieDeficiëntie van orotidyl-decarboxylase · Deficiëntie van uridinemonofosfaatsynthetase · Hereditaire orootacidurie
ptAcidúria orótica hereditáriaAcidúria orótica · Deficiência de descarboxilase orotidílica · Deficiência de uridina monofosfato sintetase
plDziedziczna kwasica orotowaKwasica orotowa · Niedobór dekarboksylazy orotydyny · Niedobór syntetazy monofosforanu urydyny
csDědičná orotová acidurieOrotová acidurie
ukСпадкова оротова ацидуріяДефіцит оротидилдекарбоксилази · Дефіцит уридинмонофосфатсинтетази
zh遗传性乳清酸尿症尿苷一磷酸合成酶缺乏症
trKalıtsal orotik asidüriOrotidilik dekarboksilaz eksikliği · Üridin monofosfat sentetaz eksikliği

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM258900Evalidated
ICD-10E79.8NTBTindexvalidated
ICD-113A03.0Especificvalidated
MONDO0009797Evalidated
MONDO9797Evalidated
MeSHC537136Evalidated
UMLSC0220987Evalidated
GARD5429Evalidated
MedDRA10052621Evalidated

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 (3):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
UMPSDisease-causing germline mutation(s) (loss of function) inAssessedHGNC:12563ENSG000001144916138913q21.2uridine monophosphate synthetase9042911[PMID]_19562503[PMID]
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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families20 casesWorldwideCase(s)Validated25757096[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_25757096[PMID]

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

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HPO phenotypes

16 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0003355Aminoaciduria
HP:0001903Anemia
HP:0001263Global developmental delay
HP:0003526Orotic acid crystalluria
HP:0003218Oroticaciduria
Frequent (79-30%)
HP:0008388Abnormal toenail morphology
HP:0011840Abnormality of T cell physiology
HP:0000069Abnormality of the ureter
HP:0000494Downslanted palpebral fissures
HP:0001385Hip dysplasia
HP:0000316Hypertelorism
HP:0001643Patent ductus arteriosus
HP:0000358Posteriorly rotated ears
HP:0002205Recurrent respiratory infections
HP:0001744Splenomegaly
HP:0000431Wide nasal bridge

Run the differential on the 5 obligate / very frequent terms

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Sources for this card