Cranial IrradiationCarcinoma, Small CellSmall Cell Lung CarcinomaBrain NeoplasmsLung NeoplasmsAntineoplastic Combined Chemotherapy ProtocolsCombined Modality TherapyOrgan Sparing TreatmentsEtoposideRadiation InjuriesDose FractionationRadiotherapy DosageVincristineCisplatinRemission InductionSurvival AnalysisDisease-Free SurvivalPrecursor Cell Lymphoblastic Leukemia-LymphomaSurvival RateTreatment OutcomeMethotrexateNeoplasm StagingChemotherapy, Adjuvant6-MercaptopurineRadiotherapyAsparaginaseInjections, SpinalLeukemia, LymphoidWhole-Body IrradiationDose-Response Relationship, RadiationCyclophosphamideAntineoplastic AgentsCentral Nervous System NeoplasmsCytarabineDoxorubicinRadiation Injuries, ExperimentalIntelligenceDrug Administration ScheduleDaunorubicinMeningeal NeoplasmsFollow-Up StudiesPrognosisTime FactorsAntimetabolites, AntineoplasticUltraviolet RaysSurvivorsIntelligence TestsRadiotherapy, AdjuvantCerebellar NeoplasmsBreast NeoplasmsRecurrenceBrainNeoadjuvant TherapyCognition DisordersMedulloblastomaProspective StudiesPrednisoneGamma RaysLeukemiaAntibiotic ProphylaxisBone Marrow TransplantationLearning DisordersFood IrradiationRetrospective StudiesRisk FactorsNeoplasm Recurrence, LocalAge FactorsCarboplatinPaclitaxelVinblastineNeoplasmsInduction ChemotherapyTaxoidsLeukocyte CountIfosfamideDexamethasoneLymphatic IrradiationNeuropsychological Tests