A case of primary aldosteronism associated with renal artery stenosis and preclinical Cushing's syndrome.

We identified a left adrenal tumor, left renal atrophy, and left renal artery stenosis (RAS) in a 52-year-old man by MRI/magnetic resonance angiography (MRA) during evaluation of hypertension. Laboratory tests revealed hypokalemia, a high plasma aldosterone concentration (PAC), low plasma renin activity (PRA), and normal plasma cortisol. An excessive response of aldosterone and cortisol to adorenocorticotrophic hormone (ACTH) was found upon selective sampling of the left adrenal vein.