Gastric MucosaLymphomaLymphoma, B-Cell, Marginal ZoneStomach NeoplasmsLymphoma, Non-HodgkinLymphoma, B-CellLymphoma, Large B-Cell, DiffuseHelicobacter pyloriHelicobacter InfectionsLymphoma, T-CellGastritisGastroscopyLymphoma, FollicularIntestinal MucosaCarbazilquinoneBurkitt LymphomaGastrectomyProto-Oncogene Proteins c-bcl-6MicromanipulationStomach UlcerAntigens, CD20DissectionMouth MucosaLymphoma, Mantle-CellNeoplasm StagingLymphoma, T-Cell, CutaneousStomach DiseasesGastrointestinal NeoplasmsStomachOmeprazoleLymphoma, T-Cell, PeripheralLymphoma, AIDS-RelatedRetrospective StudiesLymphoma, Large-Cell, AnaplasticPrognosisImmunohistochemistryCombined Modality TherapyGastric JuiceAmoxicillinEndosonographyParietal Cells, GastricMetaplasiaNasal MucosaHodgkin DiseaseDNA, NeoplasmGastric AcidPyloric AntrumPolymerase Chain ReactionAntineoplastic Combined Chemotherapy ProtocolsTreatment OutcomeChoristomaLymphoma, Large-Cell, ImmunoblasticSurvival AnalysisGastritis, AtrophicGastrinsSurvival RateGastric MucinsPepsinogensPolymorphism, Single-Stranded ConformationalBiopsyAnti-Ulcer AgentsVincristineH(+)-K(+)-Exchanging ATPaseHelicobacterMucous MembraneHydrochloric AcidAntibodies, Monoclonal, Murine-DerivedPrednisoneGastric FundusTranslocation, GeneticPentagastrinLymphoma, Extranodal NK-T-CellPrecancerous ConditionsDuodenumCyclophosphamideMeckel DiverticulumB-LymphocytesEthanolHistamineDoxorubicinRe-EpithelializationChromosomes, Human, Pair 14Cathepsin EUreaseAntigens, CD30ImmunophenotypingIndomethacinHerpesvirus 4, HumanAntibodies, MonoclonalRNA, MessengerChromosomes, Human, Pair 18MucusPeptic UlcerRats, WistarLymph NodesCimetidineHelicobacter heilmannii16,16-Dimethylprostaglandin E2Duodenal UlcerPepsin A