Pernicious anemia with vitamin B 12  malabsorption.
D000752:Anemia, Pernicious / Q000150:complications*; D006801:Humans; D008286:Malabsorption Syndromes / Q000150:complications*; D008297:Male; D008875:Middle Aged; D009461:Neurologic Manifestations; D012546:Schilling Test; D014806:Vitamin B 12 Deficiency / Q000150:complications*