Definition for View source for Pernicious anemia

1)'''Pernicious anemia''' is a decrease in [[Red blood cells]] that occurs when the body cannot properly absorb vitamin B<sub>12</sub> from the [[Gastrointestinal tract]]. Vitamin B<sub>12</sub> is necessary for the proper development of red blood cells.&nbsp;Pernicious anemia is a type of [[Megaloblastic anemia]]. 

2) Anemia associated with insufficient absorption of vitamin B12 by the digestive system. Vitamin B12 is necessary for erythrocyte production.<br>