A 28-Year-Old Man Comes to the Physician with Muscle Weakness

A 28-year-old man comes to the physician with muscle weakness and headaches for the last 2 months.  He denies palpitations, tremors, or increased sweating.  His blood pressure is 190/120 mm Hg and his pulse is 68/min.  His serum potassium level is 2.8 mEq/L.  The patient's plasma renin activity is high and his serum aldosterone levels are elevated.  A 24-hour urine collection shows increased potassium excretion.  Which of the following is the most likely cause of this patient's symptoms?

A) Adrenal cortical tumor
B) Adrenal medullary tumor
C) Juxtaglomerular cell tumor
D) Pituitary tumor
E) Primary hypertension

Correct Answer:

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