TY - CHAP M1 - Book, Section TI - The Acute Lymphocytic Leukemias A1 - Lichtman, Marshall A. A1 - Kaushansky, Kenneth A1 - Kipps, Thomas J. A1 - Prchal, Josef T. A1 - Levi, Marcel M. Y1 - 2011 N1 - T2 - Williams Manual of Hematology, 8e AB - Acute lymphocytic (syn. lymphoblastic) leukemia (ALL) is a neoplastic disease of immature lymphocytes or lymphocyte progenitor cells of either the B- or T-cell lineage.The immune phenotype of the leukemia cells reflects the cell-lineage and differentiation stage of the transformed clone.At diagnosis the leukemia cells typically have replaced normal cells in the marrow and have disseminated to various extramedullary sites, accounting for many of the clinical manifestations.Treatment of ALL has progressed incrementally, beginning with the development of effective therapy for central nervous system (CNS) disease, followed by intensification of early treatment.Based on National Cancer Institute statistics, patients with ALL <45 years of age have a 5-year survival of 75 percent, which is heavily influenced by the approximately 80 percent cure rate in children with the disease. The 5-year survival is approximately 25 percent in the age group 45 to 54 and decreases in each succeeding decade to approximately 6 percent in patients over 65 years. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/23 UR - hemonc.mhmedical.com/content.aspx?aid=1126653275 ER -