Diagnosis of Cushing's disease in a patient with consistently normal urinary free cortisol levels: a case report
نویسندگان
چکیده
The urinary free cortisol (UFC) test is widely used for the screening of Cushing's syndrome. This case study illustrates the potential failure of the UFC test to correctly diagnose Cushing's disease (CD), indicating that the use of other complementary tests may be necessary to diagnose this disease in some cases.
منابع مشابه
Undetectable urinary free cortisol concentrations in a case of Cushing's disease.
Measurement of the 24-h urinary free cortisol is a valuable screening test of endogenous hypercortisolism and, although false positive results may occur in a few situations, for example endogenous depression, false negative results are unusual. We report a case of a 48-year-old lady with pituitary-dependent Cushing's disease, whose 24-h urinary free cortisol excretion was consistently undetecta...
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