A 60 year old male presented with skin hyperpigmentation, central obesity, violet striae & proximal myopathy. His BP is 160/90 mmHg. Lab studies show hypokalemic metabolic alkalosis. Which of the following statements is true regarding this condition?
Basal ACTH level is likely to be low. Circulating coicotropin-releasing hormone is likely to be elevated. Pituitary magnetic resonance imaging (MRI) will visualize all ACTH-secreting tumors. Serum potassium level <3.3 mmol/L is suggestive of ectopic ACTH production