Histiocytoma, Benign FibrousHistiocytoma, Malignant FibrousHistiocytomaSoft Tissue NeoplasmsSarcomaHistiocytic SarcomaSkull NeoplasmsRetroperitoneal NeoplasmsLiposarcomaFemoral NeoplasmsAngiomatosisTumor Markers, BiologicalBone NeoplasmsMyxosarcomaHeart NeoplasmsDog DiseasesSkin NeoplasmsVascular NeoplasmsGiant Cell TumorsFatal OutcomeGenital Neoplasms, MalePiezosurgeryImmunohistochemistryNeoplasm Regression, SpontaneousTomography, X-Ray ComputedTracheobronchomegalyFibromaTumor BurdenTumor Necrosis Factor-alphaOsteosarcomaThighOrbital NeoplasmsCell Line, TumorMaxillary Sinus NeoplasmsHistiocytesDermatofibrosarcomaFibrosarcomaNeoplasms, Multiple PrimaryCystadenocarcinomaWilms TumorNeoplasm Recurrence, LocalNeoplasm MetastasisChondrosarcomaNeoplasms, Radiation-InducedNeoplasms, ExperimentalGenes, Tumor SuppressorMediastinal NeoplasmsSpinal NeoplasmsCarcinoid TumorLeiomyosarcomaTumor Suppressor Protein p53VimentinMagnetic Resonance ImagingNeuroendocrine Tumors