Which one of the following laboratory test results is NOT confirmatory of Cushings’ syndrome?
A. Failure to suppress serum cortisol with low dose of oral dexamethasone
B. Abnormally elevated late night serum cortisol
C. Abnormally elevated late night salivary cortisol
D. Reduced levels of 24 hour urine free cortisol
Answer:D
Which one of the following laboratory test results is NOT confirmatory of Cushings’ syndrome?
A. Failure to suppress serum cortisol with low dose of oral dexamethasone B. Abnormally elevated late night serum cortisol C. Abnormally elevated late night salivary cortisol D. Reduced levels of 24 hour urine free cortisol