What is megaloblastic (pernicious) anemia?
Megaloblastic anemia, also called pernicious anemia, is a type of anemia characterized by very large red blood cells. In addition to the cells being large, the inner contents of each cell are not completely developed. This malformation causes the bone marrow to produce fewer cells, and, sometimes, the cells die earlier than the 120-day life expectancy. Instead of being round or disc-shaped, the red blood cells can be oval.