Vitamin B12 malabsorption associated with a normal Schilling test result.
A patient with vitamin B12 deficiency and a true normal Schilling test result is presented. This patient could absorb chemically pure vitamin B12 normally but could not absorb protein-bound vitamin B12.
D006801:Humans; D008286:Malabsorption Syndromes / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D012546:Schilling Test; D014806:Vitamin B 12 Deficiency / Q000175:diagnosis*