VITAMIN B12 DEFICIENCY ANAEMIA
LOW INTAKE:
Strict vegetarian
Poverty
NORMAL INTAKE:
-With malabsorption:
Stomach:
Gastrectomy
Atrophic gastritis
Pernicious anaemia
Achlorhydria
Pancreas:
Chronic pancreatitis
Intestine:
Ileal resection
Tropical sprue
Crohn's disease
Diverticulitis
Stagnant (/Blind) loop syndrome
Neomycin
Fish tape worm
Mutated Cubulin and Amnionless
-With normal absorption:
Normal uptake of erythron in high demand-to-supply state:
Chronic haemolysis
Destruction of B12:
Anaesthetic Nitrous oxide