Acute and delayed hemolytic transfusion reactions secondary to HLA alloimmunization.

Background: HLA antibodies may be directed against HLA antigens on RBCs, but these antibodies are generally not considered to be clinically significant in transfusion practice. A case of a multiparous woman who had hemolytic transfusion reactions due to HLA-related Bg antibodies is reported.

Case Report: A 37-year-old woman was admitted with anemia.