Adrenal Gland Neoplasms; Focal Nodular Hyperplasia/etiology; Hepatoblastoma/diagnosis; Liver Neoplasms/diagnosis; Neoplasms, Second Primary/diagnosis; Neuroblastoma; Adrenal Gland Neoplasms/drug therapy; Adrenal Gland Neoplasms/radiotherapy; Adrenal Gland Neoplasms/surgery; Antibodies, Monoclonal/therapeutic use; Antibodies, Monoclonal, Murine-Derived; Antineoplastic Combined Chemotherapy Protocols/therapeutic use; Bone Marrow Transplantation; Carboplatin/administration & dosage; Child, Preschool; Cisplatin/administration & dosage; Combined Modality Therapy; Cyclophosphamide/administration & dosage; Etoposide/administration & dosage; Fluorouracil/administration & dosage; Granulocyte Colony-Stimulating Factor/administration & dosage; Hepatectomy; Hepatoblastoma/complications; Hepatoblastoma/diagnostic imaging; Hepatoblastoma/drug therapy; Hepatoblastoma/surgery; Humans; Ifosfamide/administration & dosage; Immunoglobulin G/therapeutic use; Incidental Findings; Liver Neoplasms/complications; Liver Neoplasms/diagnostic imaging; Liver Neoplasms/drug therapy; Liver Neoplasms/surgery; Male; Melphalan/administration & dosage; Mesna/administration & dosage; Neoplasms, Radiation-Induced/etiology; Neoplasms, Second Primary/complications; Neoplasms, Second Primary/pathology; Neuroblastoma/drug therapy; Neuroblastoma/radiotherapy; Neuroblastoma/surgery; Radiotherapy, Adjuvant/adverse effects; Tomography, X-Ray Computed; Vincristine/administration & dosage