heart intensity ( hi ) in the 24- and 48-hr images of meta- [ 131i ] iodobenzylguanidine ( i-131 mibg ) , a pheochromocytoma-seeking guanethidine analog , were compared with concentrations of plasma and urinary catecholamines and their metabolites in nonpheochromocytoma and pheochromocytoma patients .
C0018318
guanethidine
C0031511
pheochromocytoma