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. 1. Any of the blood vessels that carry blood toward the heart. Veins are thin-walled and contain valves that prevent the backflow of blood. All veins except the pulmonary vein (which returns to the heart from the lungs) carry blood having low levels of oxygen. 2.
See the entire definition of Rule out. Saphenous vein: The saphenous veins -- there are two, the great and the small saphenous ve... See the entire definition of Saphenous vein. Scan: As a noun, the data or image obtained from the examination of organs or regions of... See the entire definition of Scan