what causes pernicious anemia
Technically, the term pernicious anemia refers to vitamin B12 deficiency due to a lack of intrinsic factor. Often though, vitamin B12 deficiency due to other causes also is called pernicious anemia. This article discusses pernicious anemia due to a lack of intrinsic factor and other causes.n pernicious anemia, the body can't make enough healthy red blood cells because it doesn't have enough vitamin B12. Without enough vitamin B12, your red blood cells don't divide normally and are too large.