prospective screening for adrenal medullary abnormalities by means of measurement of 24-hour urinary epinephrine excretion and the ratio of urinary epinephrine to norepinephrine was predictive of pheochromocytoma in 10 of 11 patients ( with a false negative result in one patient ) but was not useful in diagnosing adrenal medullary hyperplasia .
C0014563
epinephrine
C0028351
norepinephrine