Detecting Mild Autonomous Cortisol Secretion in Patients With Adrenal Incidentaloma

Inclusion Criteria: 1. Patients ages 18 years and older. 2. Presence of adrenal incidentaloma by cat scan (CT) or magnetic resonance imaging (MRI) examination. 3. 1-mg Dexamethasone suppression test cortisol ≤ 5 μg/dL with adequate dexamethasone level. Exclusion Criteria: 1. 1-mg Dexamethasone suppression test cortisol \> 5 μg/dL with adequate dexamethasone level. Patients who fail to suppress below this level will be considered to have Cushing's syndrome and will be referred for appropriate treatment. 2. Current or recent (3 months) history of use of glucocorticoid medication (including joint injections of steroids). 3. History of uncontrolled hypertension or history of hypertension with more than 2 medications. 4. History of uncontrolled type 2 Diabetes Mellitus or history of diabetes mellitus with A1c\>7.5. 5. Known History of osteoporosis 6. Documented Clinical Cushing's disease. 7. Clinical suspicion of adrenal carcinoma. 8. History of alcohol abuse/dependence. 9. History of cirrhosis of liver. 10. History of hepatitis B or C infection regardless of treatment. 11. History of type 1 diabetes. 12. History of hemochromatosis. 13. History of autoimmune hepatitis. 14. History of Wilson's disease.