on the other hand , a serum cortisol concentration of above 250 nmol/1 ( 9 x 1 micrograms/100 ml ) after low dose dexamethasone gave a false positive diagnosis of cushing 's syndrome in at most only one of 13 patients ( 7 x 7 % ) .
C0011777
dexamethasone
C0010481
cushing 's syndrome