raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:35120

Hemolytic anemia due to pyrimidine 5' nucleotidase deficiency

Synonyms: P5N deficiency · UMPH1 deficiency · Uridine 5'-monophosphate hydrolase deficiency

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

Hemolytic anemia due to pyrimidine 5' nucleotidase deficiency is a rare, hereditary, hemolytic anemia due to an erythrocyte nucleotide metabolism disorder characterized by mild to moderate hemolytic anemia associated with basophilic stippling and the accumulation of high concentrations of pyrimidine nucleotides within the erythrocyte. Patients present with variable features of jaundice, splenomegaly, hepatomegaly, gallstones, and sometimes require transfusions. Rare cases of mild development delay and learning difficulties are reported.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enHemolytic anemia due to pyrimidine 5' nucleotidase deficiencyP5N deficiency · UMPH1 deficiency · Uridine 5'-monophosphate hydrolase deficiency
frAnémie hémolytique par déficit en pyrimidine 5' nucléotidaseDéficit en P5N · Déficit en UMPH1 · Déficit en uridine 5'-monophosphate hydrolase
deHämolytische Anämie durch Pyrimidin-5'-Nukleotidase-MangelP5N-Mangel · UMPH1-Mangel · Uridine 5'-Monophosphat-Hydrolase-Mangel
esAnemia hemolítica por deficiencia de pirimidina 5' nucleotidasaDeficiencia de hidrolasa del monofosfato de uridina 5 · Deficiencia de P5N · Deficiencia de UMPH1
itAnemia emolitica da deficit di pirimidina 5' nucleotidasiDeficit di P5N · Deficit di UMPH1 · Deficit di uridina-5'-monofosfato idrolasi
nlHemolytische anemie als gevolg van pyrimidine-5'-nucleotidasedeficiëntieP5N-deficiëntie · UMPH1-deficiëntie · Uridine-5'-monofosfaathydrolasedeficiëntie
ptAnemia hemolítica devida a deficiência de pirimidina 5' nucleotidaseDeficiência de pirimidina 5' nucleotidase
plNiedokrwistość hemolityczna z powodu niedoboru 5'nukleotydazy pirymidynowejNiedobór hydrolazy 5' monofosforanu urydyny · Niedobór P5N · Niedobór UMPH1
csHemolytická anémie způsobená nedostatkem pyrimidin-5-nukleotidázyDeficit P5N · Deficit UMPH1 · Deficit uridin-5-monofosfát hydrolázy
ukГемолітична анемія внаслідок дефіциту піримідин 5 нуклеотидазиДефіцит P5N · Дефіцит UMPH1 · Дефіцит уридин 5-монофосфатгідролази
zh5-核苷酸嘧啶缺乏所致溶血性贫血尿苷5'-单磷酸水解酶缺乏症
trPirimidin 5 'nükleotidaz eksikliğine bağlı hemolitik anemiP5N eksikliği · UMPH1 eksikliği · Üridin 5'-monofosfat hidrolaz eksikliği

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM266120Evalidated
ICD-10D55.3NTBTattributedvalidated
ICD-113A10.YNTBTindexvalidated
MONDO0009946Evalidated
MeSHC564859Evalidated
UMLSC1849507Evalidated

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 (2):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
NT5C3ADisease-causing germline mutation(s) inAssessedHGNC:17820ENSG000001226436062247p14.35'-nucleotidase, cytosolic IIIA11369620[PMID]_12714505[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families3 casesWorldwideCase(s)Validated6317231[PMID]_11369620[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidated6317231[PMID]_11369620[PMID]_ORPHANET

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.

7

Sources for this card