Neonatal lupus erythematosus is an immune-mediated disease that rarely is associated with congenital heart block. Transient hepatitis, thrombocytopenia and anemia can also occur. We describe a case of neonatal lupus erythematosus and review the clinical and laboratory manifestations of this rare disease. Its only clinical sign might be an annular facial rash. The rash is usually diagnostic, but...

A new platelet alloantigen, Sr", is described that was defined by an alloantibody detected in the serum of a healthy mother who delivered a child with typical clinical signs of neonatal alloimmune thrombocytopenia (NAIT). The antibody reacted strongly with the child's and father's platelets, but not with platelets of the mother or with those of a highly selected panel representing all known pla...

A new platelet alloantigen, Sr", is described that was defined by an alloantibody detected in the serum of a healthy mother who delivered a child with typical clinical signs of neonatal alloimmune thrombocytopenia (NAIT). The antibody reacted strongly with the child's and father's platelets, but not with platelets of the mother or with those of a highly selected panel representing all known pla...

Fetal and neonatal immune thrombocytopenia (FNIT) is a severe bleeding disorder in which maternal antibodies cross the placenta and destroy fetal/neonatal platelets. It has been demonstrated that the neonatal Fc receptor (FcRn) regulates immunoglobulin G (IgG) homeostasis and plays an important role in transplacental IgG transport. However, the role of FcRn in the pathogenesis and therapy of FN...

Young (immature) platelets containing residual RNA, so-called reticulated thrombocytes, appear in the peripheral blood after the release from bone marrow. It has been shown that the count of the reticulated platelet correlates with the megakaryocyte mass. As of late, the immature platelet fraction (IPF) may be reliably quantified with the fully automated blood analyzer Sysmex XE-2100. IPF may b...

Neonatal lupus erythematosus is an uncommon passive autoimmune disease in which there is transplacental passage of anti-Ro/SSA and/or anti-La/SSB or anti-U1RNP maternal autoantibodies. Its common clinical manifestations include cardiac disease, notably congenital heart block, cutaneous lupus lesions, and hematologic problems. During the past decade, it has become clear that hepatobiliary diseas...

BACKGROUND Neonatal alloimmune thrombocytopenia is most commonly due to transplacental passage of maternal anti-HPA 1a antibodies. A prospective study was carried out to evaluate the pattern and quantity of maternal anti-HPA 1a antibodies in order to predict the level of thrombocytopenia in the neonates. DESIGN AND METHODS A monoclonal antibody immobilization of platelet antigen assay was use...