Histiocytoma, Benign FibrousHistiocytoma, Malignant FibrousHistiocytomaSarcomaSoft Tissue NeoplasmsHistiocytic SarcomaSarcoma, EwingSarcoma, SynovialSarcoma, KaposiAvian Sarcoma VirusesSkull NeoplasmsLiposarcomaRetroperitoneal NeoplasmsSarcoma, ExperimentalSarcoma 180Femoral NeoplasmsBone NeoplasmsAngiomatosisVascular NeoplasmsMyxosarcomaSarcoma Viruses, MurineHeart NeoplasmsOsteosarcomaFatal OutcomePiezosurgeryDog DiseasesGenital Neoplasms, MaleNeoplasm Regression, SpontaneousTracheobronchomegalyLeiomyosarcomaImmunohistochemistryThighSkin NeoplasmsFibromaSarcoma, AvianGiant Cell TumorsOrbital NeoplasmsHistiocytesTomography, X-Ray ComputedDermatofibrosarcomaMaxillary Sinus NeoplasmsChondrosarcomaSarcoma, MyeloidSarcoma, Endometrial StromalSarcoma, Clear CellCystadenocarcinomaNeoplasms, Multiple PrimaryNeoplasms, Radiation-InducedFibrosarcomaMediastinal NeoplasmsSpinal NeoplasmsNeoplasm Recurrence, LocalSarcoma, YoshidaKirsten murine sarcoma virusVimentin