TY - CHAP M1 - Book, Section TI - Polyclonal Polycythemias (Primary and Secondary) A1 - Lichtman, Marshall A. A1 - Kaushansky, Kenneth A1 - Kipps, Thomas J. A1 - Prchal, Josef T. A1 - Levi, Marcel M. PY - 2011 T2 - Williams Manual of Hematology, 8e AB - Polycythemia (also known as erythrocytosis) is characterized by an increased red cell blood volume. Polycythemias can be primary or secondary and either inherited or acquired.Classification of polycythemic disorders appears in Table 2–2 in Chap. 2.Primary polycythemias are caused by somatic or germline mutations causing changes within hematopoietic stem cells or erythroid progenitors causing an augmented response to erythropoietin.Secondary polycythemias are caused by either an appropriate or inappropriate increase in the red cell mass as a result of augmented levels of erythropoietin. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/24 UR - hemonc.mhmedical.com/content.aspx?aid=1126651876 ER -