Key Points. 1  Megaloblasts are large nucleated RBC precursors with noncondensed chromatin. 2  The most common causes of megaloblastic, macrocytic anemia are deficiency or defective utilization of vitamin B12 or folate. 3  Do CBC, RBC indices, reticulocyte count, and peripheral smear.
Vein (noun). a train of association, thoughts, emotions, or the like; a current; a course. Vein (noun). peculiar temper or temperament; tendency or turn of mind; a particular disposition or cast of genius; humor; strain; quality; also, manner of speech or action; as, a rich vein of humor; a satirical vein.
1. of or pertaining to a vein or veins. 2. having or composed of veins. 3. pertaining to or designating the oxygen-poor, dark red blood that is carried back to the heart by the veins and by the pulmonary artery. [1620â30; < Latin vÄnÅsus; see vein, -ous]