Gastrointestinal Stromal TumorsStromal CellsProto-Oncogene Proteins c-kitGastrointestinal NeoplasmsBenzamidesSex Cord-Gonadal Stromal TumorsPiperazinesPyrimidinesReceptor, Platelet-Derived Growth Factor alphaSpinal CordSpinal Cord InjuriesTumor Markers, BiologicalImmunohistochemistryEndometrial Stromal TumorsMesenchymomaAntineoplastic AgentsSarcoma, Endometrial StromalNephroma, MesoblasticTumor BurdenCell Line, TumorDuodenal NeoplasmsMitotic IndexNeoplasms, Connective TissuePyrrolesJejunal NeoplasmsNeoplasms, Multiple PrimaryEpithelioid CellsTumor Necrosis Factor-alphaLeiomyosarcomaMutationStomach NeoplasmsIleal NeoplasmsTomography, X-Ray ComputedIntestinal NeoplasmsUmbilical CordIndolesTreatment OutcomeAntigens, CD34Protein Kinase InhibitorsCarcinoid TumorCell ProliferationNeoplasms, Complex and MixedSarcomaCarney ComplexWilms TumorDNA Mutational AnalysisLeiomyomaPrognosisNeoplasm MetastasisNeurofibromatosis 1Neoplasms, ExperimentalGenes, Tumor SuppressorTumor MicroenvironmentDigestive System Surgical ProceduresGranulosa Cell TumorGastrectomyNeoplasm ProteinsAdenocarcinomaMesenchymal Stromal CellsTumor Suppressor Protein p53Disease ProgressionRetrospective StudiesS100 ProteinsDisease-Free SurvivalSignal TransductionNeurilemmomaOvarian NeoplasmsReverse Transcriptase Polymerase Chain ReactionKidney NeoplasmsGastroscopyRNA, MessengerTime FactorsLiver NeoplasmsDNA, NeoplasmOmentumPeritoneal NeoplasmsNeuroendocrine TumorsTumor Suppressor ProteinsNeoplasm StagingBrain NeoplasmsNeovascularization, PathologicCells, CulturedGene Expression Regulation, NeoplasticXenograft Model Antitumor AssaysExonsInterstitial Cells of CajalLaparotomyKi-67 AntigenMixed Tumor, MalignantEndosonographyMammary Neoplasms, ExperimentalNeoplasmsPositron-Emission TomographyMice, Inbred C57BLTransplantation, HeterologousDrug Resistance, NeoplasmNeoplasm Recurrence, LocalSoft Tissue NeoplasmsBone Marrow CellsMice, Inbred BALB C