A case report of refractory warm autoimmune hemolytic anemia treated with plasmapheresis and rituximab.

A 30-year-old male presented with severe, warm autoimmune hemolysis 17 months subsequent to a matched, unrelated peripheral hematopoietic stem cell transplant. The patient responded poorly to conventional therapy with steroids and immunoglobulin, prompting the initiation of rituximab. On account of persistent, severe hemolysis, therapeutic plasma exchange was employed as a bridge until the rituximab therapy became effective. Immediately following plasmapheresis, the patient demonstrated clinical improvement followed by attenuation of the hemolysis and improved reticulocytosis. The hemoglobin concentration and reticulocyte index demonstrated further improvement following subsequent doses of rituximab and continued following the cessation of plasmapheresis. This case suggests the utility of plasmapheresis and rituximab in severe, life-threatening cases of warm autoimmune hemolytic anemia refractory to conventional therapy.