Megaloblastic anemia (What is) and vitamin B12 deficiency

Megaloblastic anemia is a disorder of abnormally large red blood cells. It is usually caused by deficiency of vitamin B12 or folic acid.

(Info from http://www.tcolincampbell.org/courses-resources/article/megaloblastic-anemia-symptoms-and-risk-factors/category/hematology/ )

Megaloblastic anemia, a hallmark of vitamin B12 deficiency.

(Info from http://ods.od.nih.gov/factsheets/VitaminB12-QuickFacts/ )