Lymphoma, AIDS-RelatedHodgkin DiseaseLymphomaLymphoma, B-CellLymphoma, Non-HodgkinLymphoma, T-CellReed-Sternberg CellsLymphoma, Large B-Cell, DiffuseLymphoma, FollicularBurkitt LymphomaLymphoma, B-Cell, Marginal ZoneLymphoma, Large-Cell, AnaplasticLymphoma, Mantle-CellLymphoma, T-Cell, CutaneousLymphoma, T-Cell, PeripheralAntigens, CD30VincristinePrednisoneBleomycinHerpesvirus 4, HumanDoxorubicinEpstein-Barr Virus InfectionsLymphoma, Large-Cell, ImmunoblasticAntigens, CD20Antineoplastic Combined Chemotherapy ProtocolsProcarbazineAntibodies, Monoclonal, Murine-DerivedCyclophosphamideVinblastineTreatment OutcomeB-LymphocytesImmunohistochemistryImmunophenotypingTranslocation, GeneticLymph NodesPrognosisDacarbazineRetrospective StudiesAcquired Immunodeficiency SyndromeMediastinal NeoplasmsLymphoma, Extranodal NK-T-CellProto-Oncogene Proteins c-bcl-6Risk FactorsRemission InductionEtoposideCombined Modality TherapySurvival RateNeoplasm StagingMechlorethamineChromosomes, Human, Pair 14Antibodies, MonoclonalGerminal CenterGene RearrangementCell Line, TumorDisease-Free SurvivalSurvival AnalysisTransplantation, AutologousNeoplasms, Second PrimaryTumor Markers, BiologicalRecurrenceChromosomes, Human, Pair 18Antineoplastic AgentsFollow-Up StudiesLeukemia, Lymphocytic, Chronic, B-CellGene Rearrangement, B-Lymphocyte, Heavy ChainTime FactorsImmunoglobulin Heavy ChainsPolymerase Chain ReactionFatal OutcomeTumor Cells, CulturedGene Expression Regulation, NeoplasticIncidenceHIV InfectionsGenes, ImmunoglobulinSalvage TherapyLymphoproliferative DisordersBiopsyThymus NeoplasmsCentral Nervous System NeoplasmsGene Rearrangement, B-LymphocyteFlow Cytometry