in a series of 27 patients with proved pheochromocytoma , differential analysis of catecholamines in blood , urine , and tumor specimens of 19 patients enabled grouping of subjects into those whose tumors produced predominantly norepinephrine ( ne ) ( 11 patients ) , predominantly epinephrine ( e [ two patients ] ) and approximately equal amounts of both ( six patients ) .
C0028351
norepinephrine
C0014563
epinephrine