- Patients must have a diagnosis of neuroblastoma (ICD-O morphology 9500/3) verified by histology and/or demonstration of clumps of tumor cells in bone marrow with elevated urinary catecholamine metabolites. Patients with the following disease stages at diagnosis are eligible, if they meet the other specified criteria. The revised International Neuroblastoma Staging System (INSS) will be used to stage all patients 58. (See 14.3 for risk assignment).