Last updated: Wednesday, 24, November, 2010
Dexamethasone suppression test (overnight) and/or cortisol (free) - urine are performed initially, as normal results exclude Cushing’s syndrome.
In patients with abnormal results, a dexamethasone suppression test (long), including ACTH levels, provides the definitive diagnosis and differentiates pituitary from adrenal causes. Electrolytes.
Diagnostic imaging, as appropriate.
|Pituitary-dependent adrenal hyperplasia. See Pituitary hormone excess-Adrenocorticotrophin excess|
Iatrogenic (corticosteroid therapy)