Sarcoma, KaposiSarcomaHerpesvirus 8, HumanSarcoma, EwingSarcoma, SynovialAvian Sarcoma VirusesSarcoma, ExperimentalSarcoma 180Sarcoma Viruses, MurineLymphoma, Primary EffusionSicilyGiant Lymph Node HyperplasiaHerpesviridae InfectionsSoft Tissue NeoplasmsSarcoma, AvianHistiocytic SarcomaSarcoma, MyeloidSarcoma, Endometrial StromalAcquired Immunodeficiency SyndromeSarcoma, Clear CellSarcoma, YoshidaKirsten murine sarcoma virusMoloney murine sarcoma virusSarcoma Viruses, FelineViral ProteinsLymphoma, AIDS-RelatedHemangioendotheliomaSkin NeoplasmsRous sarcoma virusBone NeoplasmsHIV InfectionsSarcoma, Alveolar Soft PartLeiomyosarcomaRNA-Binding Protein EWSOsteosarcomaDNA, ViralAlpharetrovirusVirus LatencyChilblainsAIDS-Related Opportunistic InfectionsCell Transformation, ViralProto-Oncogene Protein c-fli-1Harvey murine sarcoma virusAntigens, ViralIncidenceGammaretrovirusRhabdomyosarcomaAntiretroviral Therapy, Highly ActiveRisk FactorsHistiocytoma, Malignant FibrousLiposarcomaImmunohistochemistryCD4 Lymphocyte CountViral LoadTreatment OutcomeCell LineNephrogenic Fibrosing DermopathyCell Transformation, NeoplasticOncogene Proteins, FusionSarcoma 37UgandaDoxorubicinNuclear ProteinsHIV SeronegativityTime FactorsPolymerase Chain ReactionBase SequenceHistiocytoma, Benign FibrousHIV SeropositivityRetrospective StudiesVirus ReplicationHerpesvirus 7, HumanRNA, ViralAntibodies, ViralItalySarcoma, Small CellMolecular Sequence DataLangerhans Cell SarcomaVascular NeoplasmsRetroperitoneal NeoplasmsSeroepidemiologic StudiesChick EmbryoNeoplasmsBiopsyIfosfamideAnti-HIV AgentsLymphomaDendritic Cell Sarcoma, FollicularHelper VirusesKaposi Varicelliform EruptionCohort StudiesEndothelial CellsHemangiomaAntineoplastic AgentsMuscle NeoplasmsCells, CulturedCell Line, TumorAvian leukosis virusInterferon Regulatory FactorsHemangiosarcoma