In comparison to a normal healthy person, in the evening time, which of these will have an elevated ACTH as well as elevated Coisol?: (A) Normal healthy person in the morning, (B) Addison's disease, (C) Cushing's disease, (D) After exercise
Answer is C. Normally, coisol production drops just after we fall asleep. In Cushing's syndrome, coisol levels don't drop. (Loss of diurnal variation)