A 50-year old male presents with severe refractory hypeension, weakness, muscle cramps and hypokalemia, the most likely diagnosis is -
hypeension due to increased sodium reabsorption and extracellular volume expansion and potassium depletion causes multiple weakness, hypokalemia ( Harrison 17 pg 2260)
Hypoaldosteronism
Hyperaldosteronism
Cushing's syndrome
Pheochromocytoma
Endocrinology