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Can combined oral contraceptive use cause falsely elevated 24-hour urine-free cortisol?
Answer from: at Community Practice
UFC is an expression of free cortisol. It should not be affected by oral estrogen.
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Answer from: at Community Practice
Cushing is generally diagnosed by multiple tests so if one is abnormal, it is recommended to do other tests such as an overnight dexamethasone suppression test and saliva cortisol and put everything together to make the diagnosis.