THIS POPUP IS NOT BEING USED; IT WAS CHANGED TO AN EXTERNAL ROLLOVER FILE Polycythemia Risk Keys
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Exclude other causes of polycythemia:
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congenital, primary polycythemia (bone marrow hypersensitivity to erythropoietin)
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secondary polycythemia (excess erythropoietin production)
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pulmonary disease
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hypoxemia including high altitude
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kidney disease
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relative polycythemia (normal red cell mass with low plasma volume)
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Confirmatory tests include elevations of
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Transcobalamin 1
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Serum B12 level
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