A 45 year old that is being evaluated for hypertension is noted to have serum sodium level of 150 mmol/L and potassium of 3.1 mmol/L. All of the following could be consistent with the diagnosis of the Conn's syndrome in this patient, except:
Metabolic alkalosis
High serum aldosterone level
Expansion of his plasma volume (e.g. through putting him on a high salt diet) should be able to suppress his serum aldosterone level

Low (suppressed) Plasma Renin Activity (PRA)

The presence of an unilateral solitary nodule on CT scan of the adrenals
Category:
Endocrinology MCQs
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