Vitamin B 12  malabsorption due to a biologically inert intrinsic factor.
D000293:Adolescent; D000748:Anemia, Macrocytic / Q000209:etiology; D000752:Anemia, Pernicious / Q000175:diagnosis / Q000188:drug therapy / Q000209:etiology* / Q000276:immunology / Q000378:metabolism; D000941:Antigens; D002845:Chromatography; D002850:Chromatography, Gel; D003036:Cobalt Isotopes; D005750:Gastric Juice / Q000032:analysis; D006801:Humans; D007413:Intestinal Mucosa / Q000378:metabolism; D007437:Intrinsic Factor / Q000032:analysis; D007525:Isoelectric Focusing; D008286:Malabsorption Syndromes / Q000209:etiology*; D008297:Male; D014805:Vitamin B 12 / Q000097:blood / Q000378:metabolism* / Q000627:therapeutic use / Q000652:urine
D000941:Antigens; D003036:Cobalt Isotopes; D007437:Intrinsic Factor; D014805:Vitamin B 12