Lymphoma, B-Cell, Marginal ZoneLymphomaHodgkin DiseaseLymphoma, B-CellLymphoma, Non-HodgkinLymphoma, Large B-Cell, DiffuseLymphoma, T-CellLymphoma, FollicularBurkitt LymphomaChromosomes, Human, Pair 18Reed-Sternberg CellsTranslocation, GeneticLymphoma, Mantle-CellStomach NeoplasmsEye NeoplasmsLymphoma, Large-Cell, AnaplasticLymphoma, T-Cell, CutaneousLymphoma, AIDS-RelatedHelicobacter pyloriLymphoma, T-Cell, PeripheralChromosomes, Human, Pair 11Helicobacter InfectionsOrbital NeoplasmsGenes, Immunoglobulin Heavy ChainAntibodies, Monoclonal, Murine-DerivedConjunctival NeoplasmsChromosomes, Human, Pair 14Antigens, CD20VincristineAntigens, CD30Lymphoma, Large-Cell, ImmunoblasticNeoplasm ProteinsGene RearrangementImmunohistochemistryPrednisonePseudolymphomaHashimoto DiseaseImmunophenotypingB-LymphocytesTrisomyImmunoglobulin Heavy ChainsCyclophosphamideAntineoplastic Combined Chemotherapy ProtocolsGastritisGastric MucosaDoxorubicinHerpesvirus 4, HumanIn Situ Hybridization, FluorescenceRetrospective StudiesTreatment OutcomeNeoplasm StagingPrognosisChlorambucilGene Rearrangement, B-Lymphocyte, Heavy ChainOncogene Proteins, FusionBleomycinRemission InductionEpstein-Barr Virus InfectionsGenes, ImmunoglobulinIntestinal NeoplasmsPolymerase Chain ReactionGastroscopyParotid NeoplasmsLymphoma, Extranodal NK-T-CellGene Rearrangement, B-LymphocyteSalivary Gland NeoplasmsChromosomes, Human, Pair 3Combined Modality TherapySubmandibular Gland NeoplasmsBiopsySjogren's SyndromeGastrointestinal NeoplasmsPsittacosisChlamydophila psittaciLymph NodesDisease-Free SurvivalAntibodies, MonoclonalAntineoplastic AgentsLymphoid TissueChromosome AberrationsDNA, NeoplasmProcarbazineNeoplasms, Multiple PrimaryProto-Oncogene Proteins c-bcl-6CaspasesSurvival RateTumor Markers, BiologicalGene Expression Regulation, NeoplasticNeoplasms, Second PrimaryFollow-Up StudiesLymphoproliferative DisordersSurvival AnalysisAdaptor Proteins, Signal TransducingHelicobacter heilmanniiReverse Transcriptase Polymerase Chain ReactionMediastinal NeoplasmsVinblastineThymus NeoplasmsEtoposideImmunoglobulin Variable Region