Brain NeoplasmsLymphomaLymphoma, AIDS-RelatedHodgkin DiseaseLymphoma, B-CellLymphoma, Non-HodgkinLymphoma, T-CellLymphoma, Large B-Cell, DiffuseLymphoma, FollicularBurkitt LymphomaLymphoma, B-Cell, Marginal ZoneReed-Sternberg CellsLymphoma, Mantle-CellLymphoma, Large-Cell, AnaplasticLymphoma, T-Cell, CutaneousLymphoma, T-Cell, PeripheralCerebral ArteriesCerebral InfarctionAntigens, CD30VincristineLymphoma, Large-Cell, ImmunoblasticCerebral PalsyPrednisoneCerebrovascular CirculationMiddle Cerebral ArteryAntigens, CD20Antibodies, Monoclonal, Murine-DerivedDoxorubicinHerpesvirus 4, HumanAntineoplastic Combined Chemotherapy ProtocolsBleomycinCyclophosphamide