NCIt related terms : Intrinsic Factor Deficiency; Vitamin B12 deficiency anemia due to intrinsic factor deficiency;
NCIt definition : Megaloblastic anemia caused by vitamin B-12 deficiency due to impaired absorption.
The impaired absorption of vitamin B-12 is secondary to atrophic gastritis and loss
of gastric parietal cells.;
Alternative definition : NCI-GLOSS: A type of anemia (low red blood cell count) caused by the body's inability
to absorb vitamin B12.; NICHD: Megaloblastic anemia caused by vitamin B12 deficiency due to insufficient production
of intrinsic factor by gastric parietal cells, which is essential for adequate absorption
of vitamin B12. It is classically characterized by weakness and fatigue, glossitis,
and paresthesias.;