Neoplasms, Multiple PrimarySarcomaNeoplasms, Second PrimarySarcoma, EwingSarcoma, KaposiSarcoma, SynovialSkin NeoplasmsAdenomatosis, PulmonarySoft Tissue NeoplasmsAvian Sarcoma VirusesSarcoma, ExperimentalGerm-Line MutationLi-Fraumeni SyndromeSarcoma 180Paget's Disease, MammaryMelanomaNeoplastic Syndromes, HereditaryOsteosarcomaLung NeoplasmsSarcoma Viruses, MurineGastrointestinal NeoplasmsGenes, p16Genes, p53Histiocytic SarcomaSarcoma, AvianBreast NeoplasmsRegistriesColonic NeoplasmsDNA Mutational AnalysisPedigreeHead and Neck NeoplasmsGenetic Predisposition to DiseaseCarcinoma, Squamous CellPrognosisRiskPancreatic NeoplasmsSarcoma, MyeloidNeoplasmsSarcoma, Endometrial StromalIncidenceMutationAdenocarcinomaSarcoma, Clear CellNeoplasm StagingBone NeoplasmsRetrospective StudiesExonsSarcoma, YoshidaNeoplasms, Cystic, Mucinous, and SerousKirsten murine sarcoma virusMoloney murine sarcoma virusRisk FactorsTumor Suppressor Protein p53Follow-Up StudiesSarcoma Viruses, FelineTime FactorsRous sarcoma virusLeiomyosarcomaKidney NeoplasmsVascular NeoplasmsSarcoma, Alveolar Soft PartImmunohistochemistryRNA-Binding Protein EWSHerpesvirus 8, HumanNeoplasms, ExperimentalDNA, Neoplasm