<abstract xmlns="http://www.w3.org/1999/xhtml"><p>A 21-year-old white worn was referred for evaluation of hemolytic anemia after a 9-day history of marked hemoglobinuria, jaundice, and weakness. The patient’s hematocrit was 18&amp;, despite at least eight transfusions over the previous week, and the reticulocyte count was &lt; 1%. Serologic evaluation revealed a weakly positive direct antiglobulin test with antic-C3 only The serum contained coldand warm-reactinga nti-N Dithiothreitol had no effect on either the cold- or the warm-reacting anti-N activity, and radoimmunoassay with monoclonal anti-IgG was strongly positive, indicating that both the cold- and the warm-reacting anti-N reactivity resided in the IgG fraction. The patient was treated with N – ‘N’ + red cell transfusions, prednisone, and azathioprine and gradually became transfusioni ndependent. Postrecovery typing revealed her red cells to be M+N+S+s+. This constitutes the third case of autoimmune hemolytic anemia associated with IgG autoanti-N. The marked hemoglobinuria and reticulocytopenia are unique features of this case.</p></abstract>

A 21-year-old white worn was referred for evaluation of hemolytic anemia after a 9-day history of marked hemoglobinuria, jaundice, and weakness. The patient’s hematocrit was 18&, despite at least eight transfusions over the previous week, and the reticulocyte count was < 1%. Serologic evaluation revealed a weakly positive direct antiglobulin test with antic-C3 only The serum contained coldand warm-reactinga nti-N Dithiothreitol had no effect on either the cold- or the warm-reacting anti-N activity, and radoimmunoassay with monoclonal anti-IgG was strongly positive, indicating that both the cold- and the warm-reacting anti-N reactivity resided in the IgG fraction. The patient was treated with N – ‘N’ + red cell transfusions, prednisone, and azathioprine and gradually became transfusioni ndependent. Postrecovery typing revealed her red cells to be M+N+S+s+. This constitutes the third case of autoimmune hemolytic anemia associated with IgG autoanti-N. The marked hemoglobinuria and reticulocytopenia are unique features of this case.

A case report: IgG autoanti-N as a cause of severe autoimmune hemolytic anemia

Immunohematology

{"article-title":"A case report: IgG autoanti-N as a cause of severe autoimmune hemolytic anemia"}

A 21-year-old white worn was referred for evaluation of hemolytic anemia after a 9-day history of marked hemoglobinuria, jaundice, and weakness. The patient’s...

A case report: IgG autoanti-N as a cause of severe autoimmune hemolytic anemia

Published Online: Dec 20, 2020

Page range: 83 - 86

DOI: https://doi.org/10.21307/immunohematology-2019-1049

© 1990 M.R. Combs et al., published by Sciendo.