Diagnosing Cushing syndrome

Tests that measure cortisol levels

Your healthcare provider may run several tests to see if you have Cushing syndrome (also known as hypercortisolism).

Dexamethasone suppression test (DST)
Measures the body’s response to an external source of cortisol. This test will help identify if there is a problem with how your body produces cortisol.

The DST is often recommended when Cushing syndrome is suspected.


Late-night salivary cortisol (LNSC)
Measures the amount of cortisol in your saliva at the point when it should be at its lowest level.

This test is considered by some to be the best early predictor of a Cushing disease (Pituitary Cushing syndrome) recurrence.


Urine free cortisol (UFC)
Measures the amount of cortisol in your urine over 24 hours to see if your body is producing too much.

This test is often recommended when Cushing disease (Pituitary Cushing syndrome) is suspected.


Korlym patient stories
Watch Mark’s video to learn more about Cushing syndrome, treatment with Korlym, and the importance of support.

Hear Mark's story