Histiocytoma, Benign FibrousLiposarcomaHistiocytoma, Malignant FibrousHistiocytomaLiposarcoma, MyxoidSoft Tissue NeoplasmsRetroperitoneal NeoplasmsRNA-Binding Protein FUSSarcomaNeoplasms, Adipose TissueGenital Neoplasms, MaleLipomaHistiocytic SarcomaSkull NeoplasmsFemoral NeoplasmsThighHeart NeoplasmsFatal OutcomeAngiomatosisLeiomyosarcomaMyxosarcomaMediastinal NeoplasmsImmunohistochemistryTomography, X-Ray ComputedFibromaOrbital NeoplasmsBone NeoplasmsPiezosurgeryTranscription Factor CHOPVascular NeoplasmsMuscle NeoplasmsTracheobronchomegalyDog DiseasesSpermatic CordNeoplasm Regression, SpontaneousChromosomes, Human, Pair 12Giant Cell TumorsNeoplasms, Multiple PrimaryHistiocytesMaxillary Sinus NeoplasmsSkin NeoplasmsDermatofibrosarcomaOsteosarcomaNeoplasm Recurrence, LocalMesocolonSpinal NeoplasmsFibrosarcomaDioxolesCell DedifferentiationMagnetic Resonance ImagingCystadenocarcinomaTetrahydroisoquinolinesProto-Oncogene Proteins c-mdm2ChondrosarcomaIn Situ Hybridization, Fluorescence