Keywords Disease name and synonym Definition and Differential Diagnosis Etiology Clinical Description Diagnostic Methods Epidemiology Management References Abstract Paroxysmal nocturnal hemoglobinuria (PNH) is an acquired clonal disorder of the bone marrow characterized by the lack (total or partial) of all proteins normally attached to the cell membrane by the glycosylphosphatidylinositol (GPI...

Paroxysmal nocturnal hemoglobinuria (PNH) is a rare bone marrow failure disorder that manifests with hemolytic anemia, thrombosis, and peripheral blood cytopenias. The absence of two glycosylphosphatidylinositol (GPI)-anchored proteins, CD55 and CD59, leads to uncontrolled complement activation that accounts for hemolysis and other PNH manifestations. GPI anchor protein deficiency is almost alw...