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Common Test-Ordering Errors
Part 5: Overordered Tests

Plasma Thiamin
Serum Folate
Zinc Protoporphyrin (ZPP)


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Diagnostic Algorithm for Macrocytic Anemia

Slide 8

August 2010

This algorithm, which was published by one of Mayo's hematologists, shows an approach for diagnosing the cause of macrocytic anemia that avoids the folate assay limitations. This diagnostic approach substitutes methylmalonic acid and/or homocysteine testing for folate.

Diagnostic Algorithm


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