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Possible Causes For Vitamin B12 deficiency - Causes


List of current finding(s):

Surgical, Procedure Complication
Ileum resection
Ileum/jejunocolic bypass
Small intestinal bypass
Resection of bowel
Terminal ileum surgical resection
Blind-loop syndrome
Short-bowel syndrome
Infectious Disorders (Specific Agent)
Intestinal parasites
Diphyllobothrium latum infestation
Neoplastic Disorders
Heavy chain disease (Gamma)
Zollinger-Ellison syndrome/gastrinoma
Adenocarcinoma, gastric
Intestinal/gut lymphoma
Multiple myeloma
Alpha Heavy Chain Disease
Allergic, Collagen, Auto-Immune Disorders
Crohn's disease (Regional enteritis)
Inflammatory bowel disease
Scleroderma bowel
Metabolic, Storage Disorders
Amyloidosis, gastric
Amyloidosis, gut
Ketotic hyperglycinemia, idiopathic
Methylmalonic acidemia/ketotic glycine
Transcobalamin II deficiency
Deficiency Disorders
Inadequate B12 intake
Malabsorption of B12
Vitamin B12 deficiency
Congenital, Developmental Disorders
Congenital intrinsic factor absence
Usage, Degenerative, Necrosis, Age Related Disorders
Gastritis, atrophic
Anatomic, Foreign Body, Structural Disorders
Duodenum diverticulum
Gastric scar/corrosive burn recovered
Jejunal diverticulum
Functional, Physiologic Variant Disorders
Aging, general
Diet, strict vegetarian
Pregnancy, 3rd trimester
Dieting, severe
Vegetative, Autonomic, Endocrine Disorders
Intestinal stasis/motility failure
Hypothyroidism (myxedema)
Postgastrectomy steatorrhea
Reference to Organ System
Ileum disease
Pernicious anemia
Combined system disease/pernicious an.
Pancreatic insufficiency
Bacteria intestinal overgrowth syndrome
Bacterial Overgrowth Small Bowel
Intrinsic factor lack
Heirarchical Major Groups
Terminal ileum disorders
Anticonvulsants Administration/Toxicity
Gastric Proton pump inhib Administration/Toxicity/effect
Colchicine Administration/Toxicity
Ascorbic acid/Vitamin C intake
Chlorpromazine (Thorazine) Administration/Toxicity
Cholestyramine (Questran) Administration/Toxicity
Estrogen (Premarin/Estinyl) Administration/Toxicity
Metformin (Glucophage) Administration/Toxicity
Neomycin (Mycitracin) Administration/Toxicity
Omeprazole/Esomeprazole (Prilosec/Nexium) Administration/Toxicity
Para-aminosalicylate (PAS) Administration/Toxicity
Poisoning (Specific Agent)
Alcoholism, chronic
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External Links Related to Vitamin B12 deficiency - Causes
PubMed (National Library of Medicine)
NGC (National Guideline Clearinghouse)
Medscape (eMedicine)
Harrison's Online (accessmedicine)
NEJM (The New England Journal of Medicine)