Sarcoma, Clear CellAvian Sarcoma VirusesLangerhans Cell SarcomaSarcomaSarcoma Viruses, MurineDendritic Cell Sarcoma, FollicularSarcoma, Small CellDendritic Cell Sarcoma, InterdigitatingSarcoma, SynovialSarcoma Viruses, FelineKirsten murine sarcoma virusRous sarcoma virusSarcoma, ExperimentalMoloney murine sarcoma virusCell Line, TumorSoft Tissue NeoplasmsHistiocytic SarcomaCell Transformation, ViralSarcoma, AvianHarvey murine sarcoma virusSarcoma, EwingAlpharetrovirusGammaretrovirusSarcoma, KaposiCell Transformation, NeoplasticTumor Cells, CulturedMoloney murine leukemia virusSarcoma Virus, Woolly MonkeyNeoplasms, ExperimentalCell LineGenes, ViralDefective VirusesChick EmbryoRNA VirusesOncogene Protein pp60(v-src)Tumor Markers, BiologicalSarcoma 180RetroviridaeVirus ReplicationRNA, ViralViral ProteinsOncogenic VirusesBase SequenceWilms TumorVirus CultivationHelper VirusesAvian leukosis virusOncogene Proteins, FusionMolecular Sequence DataVaccinia virusImmunohistochemistryDendritic Cells, FollicularCells, CulturedDNA, ViralNeoplasm TransplantationLymphoma, Non-HodgkinNephroma, MesoblasticReceptors, VirusNeoplasm MetastasisOncogenesMice, Inbred C57BLKidney NeoplasmsSimian virus 40TransfectionVirus AssemblyMice, Inbred BALB CTumor Necrosis Factor-alphaRNA-Binding Protein EWSLeukemia Virus, MurineLeiomyosarcomaGene Products, gagTumor BurdenLymphoma, Large B-Cell, DiffuseMast-Cell SarcomaRNA, MessengerReverse Transcriptase Polymerase Chain ReactionMice, Inbred StrainsRetroviridae ProteinsCell DivisionAmino Acid SequenceFibroblastsRNA-Directed DNA PolymeraseVirus SheddingNeoplasmsPeripheral Nervous System NeoplasmsMutationNucleic Acid HybridizationGenetic VectorsVirus DiseasesSkin NeoplasmsAntigens, ViralCell TransdifferentiationAntigens, NeoplasmSplenic NeoplasmsMelanomaAntibodies, MonoclonalFibrosarcomaQuailLymphomaEpsilonretrovirus