Schilling test

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Answer A.

USMLE Road Map Biochemistry (LANGE USMLE Road Maps)An abnormal stage 2 Schilling test can be due to bacterial overgrowth, pancreatic insufficiency, or to severe ileal disease. Pernicious anemia is due to lack of Intrinsic Factor production by the stomach. Provision of Intrinsic Factor (IF) with a step 2 Schilling test would correct for the lack of IF in pernicious anemia and thus would be normal.

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