TY - CHAP M1 - Book, Section TI - Paroxysmal Nocturnal Hemoglobinuria A1 - Lichtman, Marshall A. A1 - Kaushansky, Kenneth A1 - Prchal, Josef T. A1 - Levi, Marcel M. A1 - Burns, Linda J. A1 - Armitage, James O. Y1 - 2017 N1 - T2 - Williams Manual of Hematology, 9e 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 the complement-mediated intravascular hemolysis that is the clinical hallmark of the disease. Marrow failure and thrombophilia also complicate the disease.It is the only hemolytic anemia caused by an acquired (ie, somatic) mutation that is intrinsic to the red cell. The defect has its origins in the HSPC from which the circulating red cells are derived. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/19 UR - hemonc.mhmedical.com/content.aspx?aid=1133364028 ER -