Summary
131I-Metaiodobenzylguanidine (131I-MIBG) is one of the most effective therapies utilized for
neuroblastoma patients with refractory or relapsed disease. In this pediatric phase 1 trial,
131I-MIBG will be given in combination with dinutuximab, a chimeric 14.18 monoclonal
antibody. This study will utilize a traditional Phase I rolling 6 dose escalation design to
determine a recommended phase 2 pediatric dose. An expansion cohort of an additional 6
patients will then be enrolled. If tolerable, vorinostat will then be added to the third dose
level. A 6 patient expansion cohort may then be enrolled.