I. To prospectively analyze the factors that are currently used for risk-group assignment (v-myc avian myelocytomatosis viral oncogene neuroblastoma derived homolog [MYCN] copy number by fluorescent in situ hybridization [FISH], deoxyribonucleic acid [DNA] content by flow cytometry, and tumor histology using the International Neuroblastoma Pathologic Classification System) in neuroblastoma tumors at the time of diagnosis.