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The term normoblast is sometimes used as a synonym for erythroblast, but at other times it is considered a subcategory. In the latter context, there are two types of erythroblasts:
- "normoblasts" - develop as expected
- "megaloblasts" - unusually large erythroblasts that can be associated with vitamin B12 deficiency (as in pernicious anemia) or folic acid deficiency (collectively called megaloblastic anemia)
There are four stages in the development of a normoblast.
|Polychromatic normoblast (also polychromatophilic)|
|Orthochromatic normoblast (also orthochromatophilic)|
- Normoblasts at the US National Library of Medicine Medical Subject Headings (MeSH)
- Histology image: 01804loa — Histology Learning System at Boston University - "Bone Marrow and Hemopoiesis bone marrow smear, erythroblast series with proerythroblast "
- Histology at uiowa.edu
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