prasannakumar
Forum Senior
Topics: 24
Posts: 55
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A 57-year-old woman with a long history of Crohn's disease comes to the office because of slowly progressive ataxia and paresthesias. She is currently off all medications. Physical examination shows a decreased vibratory and positional sense and mild ataxia. A CT of the head is unremarkable. You suspect B12 deficiency secondary to Crohn's disease. A Schilling test is performed. You expect the study to show: In order: Radiolabeled Vitamin B12 urinary excretion, Radiolabeled B12 excretion after intrinsic factor added , Radiolabeled B12 excretion after intrinsic factor + antibiotics
A. Normal / Normal / Normal
B. Low/ Normal/ Normal
C. Low /Low/ Low
D. Low /Low/ Normal
E. Normal /Low/ Normal
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| cirus
Forum Guru
Topics: 108
Posts: 740
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The ans is C
in crohns disease the problem is in all the Gut so even after adding intrensic factor, the absorb will still be low (The problem is not in the intrensic factor, it is in the absorb from the intestinal wall)
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| sprint123
Forum Guru
Topics: 129
Posts: 870
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All three will be low-------Ans C!
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| prathapdoctor
Forum Elite
Topics: 12
Posts: 406
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yes, it must be C.
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| usmlestud
Forum Junior
Topics: 6
Posts: 68
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| dr in trouble
Forum Guru
Topics: 62
Posts: 610
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C
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