A Patient Has a Decreased Vitamin B₁₂ Assay

question 14

Multiple Choice

A patient has a decreased vitamin B₁₂ assay.The Schilling test detects labeled vitamin B₁₂ in the urine when it is given with IF.What is the correct interpretation?

• A)vitamin B₁₂ assay probably incorrect
• B)PA
• C)vitamin B₁₂ deficiency that is not PA
• D)gastric analysis should be performed

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