RT Book, Section A1 Lichtman, Marshall A. A1 Kaushansky, Kenneth A1 Prchal, Josef T. A1 Levi, Marcel M. A1 Burns, Linda J. A1 Linch, David C. SR Print(0) ID 1189334473 T1 Paroxysmal Nocturnal Hemoglobinuria T2 Williams Manual of Hematology, 10e YR 2022 FD 2022 PB McGraw-Hill Education PP New York, NY SN 9781264269204 LK hemonc.mhmedical.com/content.aspx?aid=1189334473 RD 2024/10/13 AB Paroxysmal nocturnal hemoglobinuria (PNH) is an acquired hematopoietic stem/progenitor cell (HSPC) disorder characterized by deficiency of glycosyl phosphatidylinositol (GPI)-anchored proteins (GPI-APs) on the surface of hematopoietic cells. Two complement regulatory proteins (CD55 and CD59) are GPI anchored, and deficiency of these two proteins on erythrocytes derived from the mutant HSPC leads to complement-mediated intravascular hemolysis that is the clinical hallmark of the disease. Marrow failure and thrombophilia also complicate the disease.