Difluoromethylornithine (DFMO) will be used in an open label, single agent, multicenter, study for patients with neuroblastoma in remission. In this study subjects will receive 730 Days of oral difluoromethylornithine (DFMO) at a dose of 750 mg/m2 250 mg/m2 BID (strata 1, 2, 3, and 4) OR 2500 mg/m2 BID (stratum 1B) on each day of study. This study will focus on the use of DFMO in high risk neuroblastoma patients that are in remission as a strategy to prevent recurrence.

Protocol JDI2007-01 is an Expanded Access Protocol with therapeutic 131I-MIBG for patients with neuroblastoma or pheochromocytoma / paraganglioma, who otherwise do not qualify for available treatments, or where approved treatment is not commercially available.