Severe neonatal thrombocytopenia due to anti-HPA-4b alloantibodies: Third report described in a Caucasian mother.
Transfusion
; 64(6): 1167-1170, 2024 Jun.
Article
en En
| MEDLINE
| ID: mdl-38693097
ABSTRACT
BACKGROUND:
Fetal and Neonatal Alloimmune Thrombocytopenia (FNAIT) results from maternal platelet alloimmunization against paternal antigens inherited by the fetus, most often due to the Human Platelet Antigen (HPA)-1 system in Caucasians. We investigated in 2023, a 30-year-old Caucasian woman Gravida 2 Para 1 who gave birth at 35 weeks of gestation to a male (body weight 2210 g) without signs of bleeding. A severe thrombocytopenia (platelet count at 3 G/L) was discovered incidentally a few hours after delivery in the context of the management of a respiratory distress. The newborn recovered after one platelet concentrate transfusion and normalized his platelet count at Day 5. STUDY DESIGN ANDMETHODS:
FNAIT investigation was performed according to guideline recommendations. Platelet genotyping was carried out by multiplex PCR. Maternal serological investigation included Monoclonal Antibody-specific Immobilization of Platelet Antigens method (MAIPA) and Luminex technology.RESULTS:
Parental and newborn genotyping pointed out an HPA-4 incompatibility between the mother and the newborn and the father. Serological investigation revealed an anti-HPA-4b alloantibody confirming the diagnosis of neonatal alloimmune thrombocytopenia.CONCLUSION:
We described the third case of anti-HPA-4b alloantibody discovered in a Caucasian mother. This case strengthens the need for reference laboratory to genotype a panel of HPA alleles reflecting local genetic population diversity and for crossmatch of maternal serum with fresh paternal platelets in clinical suspected cases of neonatal alloimmune thrombocytopenia.Palabras clave
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Antígenos de Plaqueta Humana
/
Trombocitopenia Neonatal Aloinmune
/
Isoanticuerpos
Límite:
Adult
/
Female
/
Humans
/
Male
/
Newborn
/
Pregnancy
Idioma:
En
Revista:
Transfusion
Año:
2024
Tipo del documento:
Article
País de afiliación:
Francia