RT Book, Section A1 Lichtman, Marshall A. A1 Kaushansky, Kenneth A1 Prchal, Josef T. A1 Levi, Marcel M. A1 Burns, Linda J. A1 Armitage, James O. SR Print(0) ID 1133362479 T1 Folate, Cobalamin, and Megaloblastic Anemias T2 Williams Manual of Hematology, 9e YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9781259642470 LK hemonc.mhmedical.com/content.aspx?aid=1133362479 RD 2024/04/24 AB These disorders are caused by impaired synthesis of DNA.They most commonly result from folate or cobalamin (vitamin B12) deficiency.Characteristics are megaloblastic cells, typically present in the erythroid series as large cells with immature-appearing nuclei but with increasing hemoglobinization of the cytoplasm—often referred to as nuclear-cytoplasmic asynchrony.Megaloblastic granulocytic cells have large size. Giant band neutrophils are a feature in the marrow with hypersegmented neutrophils in the marrow and blood. Megakaryocytes may be abnormally large with nuclear abnormalities.