Neoplasms, Muscle TissueSarcomaSarcoma, SynovialSplenic RuptureLeiomyosarcomaSpindle ApparatusImmunohistochemistryGranulosa Cell TumorGiant Cell Tumor of BoneGiant Cell TumorsNevus, Spindle CellGranular Cell TumorMuscle SpindlesNeoplasms, Germ Cell and EmbryonalTesticular NeoplasmsSertoli Cell TumorLeydig Cell TumorGerminomaTumor Markers, BiologicalSeminomaMitosisMicrotubulesDog DiseasesSertoli-Leydig Cell TumorSolitary Fibrous TumorsGranuloma, Plasma CellSarcoma, KaposiCarcinosarcomaSoft Tissue NeoplasmsEndodermal Sinus TumorMyofibromaAdenoma, Islet CellGastrointestinal Stromal TumorsVimentinLipomaCell Line, TumorAnaphaseSkin NeoplasmsKinetochoresTumor BurdenNeurilemmomaTumor Necrosis Factor-alphaHistiocytoma, Benign FibrousNeoplasms, ExperimentalCentrosomeMediastinal NeoplasmsMetaphaseBone NeoplasmsMixed Tumor, MalignantKinesinEpithelioid CellsKidney NeoplasmsFibromaNeoplasms, Fibrous TissueMicrotubule-Associated ProteinsTeratomaOvarian NeoplasmsChromosome SegregationWilms TumorHemangiopericytomaTumor Suppressor Protein p53MesenchymomaFatal OutcomeKeratinsGenes, Tumor SuppressorCell Cycle ProteinsPeripheral Nervous System NeoplasmsMastocytomaTubulinCell DivisionRetroperitoneal NeoplasmsDesmoplastic Small Round Cell TumorCarcinomaCarcinoid TumorS100 ProteinsHemangioendotheliomaRhabdomyosarcomaPlasma Cell Granuloma, PulmonaryNeoplasm ProteinsMutationMad2 ProteinsFibrosarcomaProto-Oncogene Proteins c-kitNeoplasms, Complex and MixedBrain NeoplasmsTomography, X-Ray ComputedNeuroendocrine TumorsAdenocarcinomaCell Transformation, NeoplasticDNA, NeoplasmNeoplasm MetastasisTumor Suppressor ProteinsNerve Sheath NeoplasmsNeoplasms, Multiple PrimaryHerpesvirus 8, HumanAurora KinasesNeoplasm Recurrence, LocalHistocytochemistryMast-Cell SarcomaMelanoma, Amelanotic