Hodgkin DiseaseLymphoma, Non-HodgkinDuodenoscopyCrohn DiseaseLymphomaReed-Sternberg CellsLymphoma, B-CellLymphoma, T-CellLymphoma, Large B-Cell, DiffuseLymphoma, FollicularBurkitt LymphomaLymphoma, B-Cell, Marginal ZoneAntigens, CD30Lymphoma, Large-Cell, AnaplasticLymphoma, AIDS-RelatedLymphoma, Mantle-CellBleomycinLymphoma, T-Cell, CutaneousLymphoma, T-Cell, PeripheralEpstein-Barr Virus InfectionsVincristineHerpesvirus 4, HumanProcarbazinePrednisoneVinblastineDoxorubicinDacarbazineAntigens, CD20Antineoplastic Combined Chemotherapy ProtocolsImmunohistochemistryCyclophosphamideAntibodies, Monoclonal, Murine-DerivedMediastinal NeoplasmsLymphoma, Large-Cell, ImmunoblasticLymph NodesImmunophenotypingB-LymphocytesMechlorethaminePrognosisEtoposideNeoplasms, Second PrimaryTreatment OutcomeTranslocation, GeneticRemission InductionNeoplasm StagingCombined Modality TherapyRetrospective StudiesProto-Oncogene Proteins c-bcl-6Survival RateDisease-Free SurvivalGerminal CenterGene Rearrangement, B-Lymphocyte, Heavy ChainTransplantation, AutologousCell Line, TumorTumor Markers, BiologicalRecurrenceSalvage TherapyViral Matrix ProteinsLymphatic IrradiationLymphoma, Extranodal NK-T-CellSurvival AnalysisOctamer Transcription Factor-2Gene Expression Regulation, NeoplasticGene RearrangementAntineoplastic AgentsAntibodies, MonoclonalTumor Cells, CulturedLeukemia, Lymphocytic, Chronic, B-CellGenes, relRadiotherapyGenes, ImmunoglobulinImmunoglobulin Heavy ChainsPositron-Emission TomographyGene Rearrangement, B-LymphocyteLymphocytesChemokine CCL17Antigens, CD15Chromosomes, Human, Pair 14Lymphoproliferative DisordersImmunoconjugatesFatal OutcomeAntigens, CDPolymerase Chain ReactionNeoplasm ProteinsB-Cell-Specific Activator ProteinChromosomes, Human, Pair 18Flow CytometryDNA, NeoplasmFollow-Up StudiesHematopoietic Stem Cell TransplantationIn Situ HybridizationNeoplasms, Radiation-InducedBiopsyFluorodeoxyglucose F18Antigens, CD79SurvivorsLeukemiaIn Situ Hybridization, FluorescenceIncidenceApoptosis