A combined effect of anti-HPA-1a and anti-HLA Class I in pregnancy?
Background: Maternal anti–human leukocyte antigen (HLA) Class I is commonly detected alongside anti–human platelet antigen (HPA)-1a in fetal and neonatal alloimmune thrombocytopenia (FNAIT). Little is known regarding whether the presence of anti-HLA Class I may exert an additive effect on the risk and severity of FNAIT. Methods and Materials: We reanalyzed samples originally collected as part of a