Question category: Cardiology
A 42 year old male is found to be hypertensive with a blood pressure of 190/100 mmHg. He is otherwise fit and well and there is nil of note on examination. Bloods reveal normal renal function however there is evidence of hypokalaemia, elevated bicarbonate and both renin and aldosterone levels are increased. A 24 hour urinary cortisol fell within the normal range. What is the most likely diagnosis?