Lymphoproliferative DisordersEpstein-Barr Virus InfectionsHerpesvirus 4, HumanOrgan TransplantationTransplantationAutoimmune Lymphoproliferative SyndromeLeukemia, Hairy CellGiant Lymph Node HyperplasiaLymphoma, B-CellLymphomaB-LymphocytesLeukemia, Lymphocytic, Chronic, B-CellLymphomatoid PapulosisHerpesviridae InfectionsLeukemia, ProlymphocyticAntigens, CD30LymphocytosisLymphoma, T-CellImmunosuppressive AgentsKidney TransplantationWaldenstrom MacroglobulinemiaImmunophenotypingLymphoma, T-Cell, CutaneousLymphomatoid GranulomatosisPseudolymphomaLeukemia, B-CellAntibodies, Monoclonal, Murine-DerivedImmunocompromised HostPostoperative ComplicationsLymphoma, Non-HodgkinCryoglobulinemiaTransplantsImmunosuppressionHodgkin DiseaseBipolar DisorderT-LymphocytesAntigens, CD20Fatal OutcomeMycosis FungoidesLeukemia, LymphoidImmunoblastic LymphadenopathyTumor Virus InfectionsLymphatic DiseasesLymph NodesAntibodies, MonoclonalEpstein-Barr Virus Nuclear AntigensAntigens, CD5Mental DisordersSplenomegalyAnxiety DisordersLeukemia, Large Granular LymphocyticAutoimmune DiseasesClone CellsBurkitt LymphomaMood DisordersLymphoma, Large B-Cell, DiffuseCladribineParaphimosisAntigens, CDParaproteinemiasFlow CytometryLung TransplantationLymphocytesLeukemia, T-CellHeart TransplantationTransplantation, HomologousLymphoma, Large-Cell, AnaplasticHerpesvirus 8, HumanLiver TransplantationLymphoma, Mantle-CellSplenic NeoplasmsPolymerase Chain ReactionLeukemia, Prolymphocytic, T-CellInfectious MononucleosisViral Matrix ProteinsDNA, ViralTreatment OutcomeLymphocyte ActivationImmunologic Deficiency SyndromesRetrospective StudiesDiagnostic and Statistical Manual of Mental DisordersNeoplasms, Plasma CellCryoglobulinsBiopsyLymphoma, AIDS-RelatedLeukemiaParaproteinsSplenectomyImmunoglobulin Heavy ChainsGene Rearrangement, gamma-Chain T-Cell Antigen ReceptorLymphoma, Primary Cutaneous Anaplastic Large CellMyeloproliferative DisordersTime FactorsBone Marrow TransplantationSkin NeoplasmsAntigens, CD79Pancreas TransplantationFluorescent Antibody Technique, DirectAntigens, CD95Immunoglobulins