neoplasms or cancers in children from birth through adolescence; includes cancers such as, childhood acute lymphocytic leukemia, Wilms' tumor, retinoblastoma, Hodgkin's disease, Ewing's sarcoma, rhabdomyosarcoma, Burkitt lymphoma, neuroblastoma, osteosarcoma, hepatoblastoma, cerebellar astrocytoma, medulloblastoma, craniopharyngioma, choroid plexus papilloma, brain stem glioma, optic glioma.