raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:464370

Neonatal alloimmune neutropenia

Type
Disease
Group
Disorder
Inheritance
Not applicable
Age of onset
Neonatal
Status
active

A rare acquired neutropenia characterized by isolated neutropenia in a newborn due to maternal alloimmunization against human neutrophil antigens (HNA) inherited from the father and present on fetal neutrophils, and subsequent increased breakdown of the latter. The condition is self-limiting and resolves after several weeks. It usually presents with only mild bacterial infections or may even be asymptomatic, although severe forms with sepsis and fatal outcome have also been reported.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enNeonatal alloimmune neutropenia
frNeutropénie néonatale allo-immune
deNeonatale Alloimmunneutropenie
esNeutropenia aloinmune neonatal
itNeutropenia alloimmune neonatale
nlNeonatale allo-immune neutropenie
ptNeutropenia neonatal aloimune
plAlloimmunologiczna neutropenia noworodków
csNeonatální aloimunní neutropenie
ukНеонатальна алергічна нейтропенія
zh新生儿同种免疫中性粒细胞减少
trYenidoğan alloimmün nötropeni

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10P61.5NTBTattributedvalidated
ICD-11KA8EEspecificvalidated
MONDO0018739Evalidated
UMLSC0272176Evalidated

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
FCGR3BBiomarker tested inAssessedHGNC:3620ENSG000001627476106651q23.3Fc fragment of IgG receptor IIIb
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Prevalence at birth1-5 / 10 00016.6 / 100 000PolandValue and classValidated11696231[PMID]
Point prevalenceUnknown—EuropeClass 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

12 annotations · validated 2021-05-27
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0003453Antineutrophil antibody positivity
HP:0001904Neutropenia in presence of anti-neutropil antibodies
Frequent (79-30%)
HP:0002090Pneumonia
HP:0032169Severe infection
Occasional (29-5%)
HP:0001945Fever
HP:0000952Jaundice
HP:0009800Maternal diabetes
HP:0001287Meningitis
HP:0032435Neonatal omphalitis
HP:0100806Sepsis
HP:0005268Spontaneous abortion
HP:0005968Temperature instability

Run the differential on the 2 obligate / very frequent terms

Annotation source: 32422924[PMID]_31049048[PMID]_31858675[PMID]

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Sources for this card