to determine whether exogenous glucocorticoids modulate this pulsatility and to study its possible etiological implications , we obtained 24-h plasma cortisol profiles in seven patients with cushing 's syndrome ( five cushing 's disease , one adrenal adenoma , and one bilateral adrenal cortical macronodular hyperplasia ) before and during suppression with various doses of dexamethasone [ low ( 0.5 mg , every 6 h ) , high ( 2 mg , every 6 h ) , and very high ( 4 mg , every 6 h ) ] .
C0010481
cushing 's syndrome
C0001622
cushing 's disease