Differential Diagnosis
Primary hypoaldosteronism
Secondary hypoaldosteronism
Suggested Additional Lab Testing
Primary hypoaldosteronism
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Serum potassium usually elevated
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Low serum sodium
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Normal or elevated plasma renin
Secondary hypoaldosteronism
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In most cases, elevated serum potassium and low or low-normal serum sodium
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Low renin production with certain causes of secondary hypoaldosteronism but normal or elevated with other causes
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