Lymphoma, AIDS-RelatedBrain NeoplasmsHodgkin DiseaseLymphomaLymphoma, B-CellLymphoma, Non-HodgkinLymphoma, T-CellReed-Sternberg CellsLymphoma, Large B-Cell, DiffuseLymphoma, FollicularBurkitt LymphomaLymphoma, B-Cell, Marginal ZoneLymphoma, Large-Cell, AnaplasticLymphoma, Mantle-CellBrain ChemistryLymphoma, T-Cell, CutaneousLymphoma, T-Cell, PeripheralBrain InjuriesAntigens, CD30VincristineBrain MappingPrednisoneBleomycinHerpesvirus 4, HumanDoxorubicinEpstein-Barr Virus InfectionsLymphoma, Large-Cell, ImmunoblasticAntigens, CD20ImmunohistochemistryAntineoplastic Combined Chemotherapy ProtocolsProcarbazineAntibodies, Monoclonal, Murine-DerivedBrainCyclophosphamideVinblastineB-LymphocytesBrain EdemaImmunophenotypingTreatment OutcomeTranslocation, GeneticPrognosisLymph NodesBrain StemDacarbazineBrain IschemiaMagnetic Resonance ImagingRetrospective StudiesMediastinal NeoplasmsLymphoma, Extranodal NK-T-CellCombined Modality TherapyProto-Oncogene Proteins c-bcl-6EtoposideRemission InductionSurvival RateTime FactorsAntibodies, MonoclonalCell Line, TumorNeoplasm StagingMechlorethamineChromosomes, Human, Pair 14Disease-Free SurvivalGene Rearrangement