When his orthostatic intolerance and tachycardia first started, I asked a different endocrinologist if aldosterone
and renin should be tested.He firmly said no, his pituitary would not affect aldosterone
and renin, they function independently of the pituitary, or something to that effect. He ordered another MRI and wrote "pituitary failure" on the form.
However, he knew my son had secondary adrenal insufficiency and was taking hydrocortisone.