Overview Phase 1 Study of Iobenguane (MIBG) I 131 in Patients With Malignant Pheochromocytoma/Paraganglioma Status: Completed Trial end date: 2011-06-01 Target enrollment: Participant gender: Summary The purpose of this study is to determine whether iobenguane I 131 is safe and effective in patients with malignant pheochromocytoma or paraganglioma. Phase: Phase 1/Phase 2 Details Lead Sponsor: Molecular Insight Pharmaceuticals, Inc.Treatments: 3-Iodobenzylguanidine