MSFinals-1100

MSFinals-1100

A 50-year-old man comes to the clinic complaining of headaches. His blood pressure measures 168/100 mmHg. Routine tests show sodium levels of 142 mmol/l (136–145), potassium levels of 2.8 mmol/l (3.5–5.0), chloride levels of 100 mmol/l (95–105), and normal levels of urea and creatinine. His plasma renin levels are undetectable, and his aldosterone levels are elevated. What is the most probable cause of his hypertension?