to ascertain the magnetic resonance ( mr ) imaging characteristics of pheochromocytomas and paragangliomas and to compare mr with computed tomography ( ct ) and iodine-131 metaiodobenzylguanidine ( i-131 mibg ) , 19 patients ( 18 with pheochromocytomas , one with a paraganglioma ) were studied .
C0031511
pheochromocytomas
C0030421
paraganglioma