巨幼红细胞性贫血(简称巨幼贫)系指骨髓中出现大量巨幼红细胞的一类贫血,主要是叶酸,维生素B_(12)缺乏引起细胞内脱氧核糖核酸(DNA)合成障碍的结果,以叶酸缺乏所致最为多见,我院近年来骨髓象检查中各类贫血占45％左右,巨幼贫又为贫血中的25％左右,提示巨幼贫并不少见。在目前条件下,一些较复杂的特异性检查如血清B_(12)、叶酸测 Megaloblastic anemia refers to the type of anemia in the bone marrow where a large number of megaloblastic cells are found, mainly folic acid, and vitamin B 12 deficiency results in a disorder of intracellular DNA synthesis. Folic acid deficiency caused by the most common in our hospital in recent years, all kinds of bone marrow examination of anemia accounted for about 45%, megaloblastic anemia and anemia in about 25%, suggesting that the young and the poor are not uncommon. Under the current conditions, some of the more complex specific tests such as serum B_ (12), folic acid test