Examination showed BP 189/68, facial plethora, dorsocervical fullness, and 3+ pitting edema up to the thighs. On second hospitalization for hypokalemia, baseline plasma ACTH was 206 pg/mL and AM serum cortisol after 1 and 8 mg of dexamethasone at bedtime was 61 and 84 渭g/dL (<1.8 渭g...