Anti-N and anti-Do immunoglobulin G alloantibody-mediated delayed hemolytic transfusion reaction with hyperhemolysis in sickle cell disease treated with eculizumab and HBOC-201: case report and review of the literature.

Background: Delayed hemolytic transfusion reaction (DHTR) with hyperhemolysis is a potentially fatal complication resulting from alloimmunization that can cause severe hemolysis of both transfused and intrinsic red blood cells (RBCs). Patients with sickle cell disease often receive multiple RBC units during their lifetime and thus are likely to develop alloantibodies that increase the risk for DHTR. Treatment to decrease hemolysis includes intravenous immunoglobulin (IVIG), steroids, eculizumab, rituximab, and plasmapheresis in addition to erythropoietin (EPO), intravenous (IV) iron, vitamin B12, and folate to support erythropoiesis.