This is the most common cause of adrenal insufficiency
Long-term use of gluccocorticoids can cause this, and it is characterized by:low CRH
low ACTH
low cortisol
The patient will have a low BP due to the low cortisol
In a healthy individual CRH stimulates ACTH which in turn stimulates Cortisol.
Normally Cortisol provides negative feedback for CRH and ACTH so when a patient has ectopic secretion of cortisol you will see decreased CRH and ACTH
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