Abstract
Megaloblastic anemias share a common feature—disordered DNA synthesis, most often resulting from deficiency of folic acid or vitamin B12 or both. However, the cause of the anemias varies from pregnancy to poor nutrition, gastrointestinal disorders, cirrhosis, hemolytic anemias, drugs, fish tapeworms, orotic aciduria, erythroleukemia or long-term dialysis for uremia.