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-DerivedCyclophosphamideVinblastineB-LymphocytesImmunohistochemistryImmunophenotypingTranslocation, GeneticLymph NodesDacarbazinePrognosisTreatment OutcomeMediastinal NeoplasmsLymphoma, Extranodal NK-T-CellRetrospective StudiesAcquired Immunodeficiency SyndromeProto-Oncogene Proteins c-bcl-6EtoposideRemission InductionCombined Modality TherapyNeoplasm StagingSurvival RateMechlorethamineChromosomes, Human, Pair 14Germinal CenterGene RearrangementAntibodies, MonoclonalCell Line, TumorDisease-Free SurvivalTransplantation, AutologousNeoplasms, Second PrimaryTumor Markers, BiologicalSurvival AnalysisChromosomes, Human, Pair 18Antineoplastic AgentsLeukemia, Lymphocytic, Chronic, B-CellRecurrenceGene Rearrangement, B-Lymphocyte, Heavy ChainImmunoglobulin Heavy ChainsTumor Cells, CulturedFatal OutcomeGene Expression Regulation, NeoplasticPolymerase Chain ReactionGenes, ImmunoglobulinSalvage TherapyLymphoproliferative DisordersThymus NeoplasmsCentral Nervous System NeoplasmsGene Rearrangement, B-LymphocyteBiopsy