ALTE15N2, LEAHRN (Late Effects After High-Risk Neuroblastoma) Study

I. To estimate the prevalence of organ dysfunction, subsequent malignant neoplasm (SMN), growth impairment, abnormal pubertal development, and neurobehavioral dysfunction in a large cohort of representative 5-year survivors of high-risk neuroblastoma treated with modern therapy. II. To identify the demographic, clinical and treatment-related risk factors associated with increased risk of organ dysfunction, SMN, growth impairment, abnormal pubertal development and neurobehavioral dysfunction in long-term survivors of high-risk neuroblastoma. III. To explore the impact of new biologic therapies and diagnostics including immunotherapy, immunocytokines, isotretinoin (cis-retinoic acid) and iobenguane I-131 (131 I-MIBG) on the risk of late effects. IV. To determine the impact of impaired organ function, physical growth, pubertal development, and neurobehavioral function on health-related quality of life (HRQOL) in long-term survivors of high-risk neuroblastoma.