Precursor Cell Lymphoblastic Leukemia-LymphomaLeukemia, Lymphocytic, Chronic, B-CellLeukemiaLeukemia, LymphoidLeukemia, Myeloid, AcuteSurvivorsNeoplasmsAsparaginaseLeukemia, Myelogenous, Chronic, BCR-ABL PositiveCytarabineLeukemia, B-CellLeukemia, ExperimentalRemission InductionLeukemia, T-CellGene Expression Regulation, LeukemicAntineoplastic AgentsPrognosisBone MarrowDaunorubicinVincristine6-MercaptopurineLeukemic InfiltrationLeukemia, Biphenotypic, AcuteMethotrexateRemission, SpontaneousAntineoplastic Combined Chemotherapy ProtocolsPrecursor B-Cell Lymphoblastic Leukemia-LymphomaLeukemia-Lymphoma, Adult T-CellAcute DiseaseLeukemia Virus, MurineKaryotypingPhiladelphia ChromosomeVidarabineB-LymphocytesLymphomaLeukemia, MyeloidLeukemia, Monocytic, AcuteLeukemia, Hairy CellBurkitt LymphomaSurvival RateLeukemia, Radiation-InducedSurvival AnalysisNeoplasms, Second PrimaryDNA, NeoplasmRisk FactorsTreatment OutcomeLymphocytes, NullNeoplasm ProteinsChromosome AberrationsImmunoglobulin Heavy ChainsDrug Resistance, NeoplasmRecurrenceFusion Proteins, bcr-ablMutationNeoplasms, Radiation-InducedRetrospective StudiesTumor Cells, CulturedInfant, NewbornReceptors, Antigen, B-CellZAP-70 Protein-Tyrosine KinaseTime FactorsCyclophosphamideChlorambucilRadiotherapyFlow CytometryMoloney murine leukemia virusAntigens, NeoplasmTranslocation, GeneticFollow-Up StudiesLeukemia L1210Myeloid-Lymphoid Leukemia ProteinPrednisoneRosette FormationImmunophenotypingCentral Nervous System NeoplasmsAntibodies, MonoclonalDisease-Free SurvivalBone Marrow TransplantationCase-Control StudiesChromosomes, Human, 6-12 and XLymphocytesAge FactorsPaternal ExposureDrug Administration ScheduleCytogenetic AnalysisLeukemia Virus, BovineLeukemia Virus, FelineBase SequenceRegistriesSiblingsAnisocoriaT-LymphocytesCell Line, TumorCladribineCohort StudiesNervous System NeoplasmsCyclin-Dependent Kinase Inhibitor p15Molecular Sequence DataNeoplasm, ResidualLeukemia P388