TY - CHAP M1 - Book, Section TI - Essential Thrombocythemia A1 - Lichtman, Marshall A. A1 - Kaushansky, Kenneth A1 - Prchal, Josef T. A1 - Levi, Marcel M. A1 - Burns, Linda J. A1 - Linch, David C. Y1 - 2022 N1 - T2 - Williams Manual of Hematology, 10e AB - The upper limit of a normal platelet count is usually between 350 × 109/L and 450 × 109/L depending on the clinical laboratory and specific method used.Table 43–1 presents the major causes of elevation of the platelet count above the normal limit. Only essential thrombocythemia (ET) is discussed here; familial and reactive thrombocytosis are discussed in Chapter 75, Hereditary and Reactive (Secondary) Thrombocytosis. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/20 UR - hemonc.mhmedical.com/content.aspx?aid=1189334457 ER -