Gastrointestinal Stromal TumorsStromal CellsProto-Oncogene Proteins c-kitGastrointestinal NeoplasmsBenzamidesSex Cord-Gonadal Stromal TumorsPiperazinesPyrimidinesReceptor, Platelet-Derived Growth Factor alphaTumor Markers, BiologicalEndometrial Stromal TumorsImmunohistochemistryMesenchymomaAntineoplastic AgentsSarcoma, Endometrial StromalNephroma, MesoblasticTumor BurdenCell Line, TumorDuodenal NeoplasmsMitotic IndexNeoplasms, Connective TissuePyrrolesJejunal NeoplasmsNeoplasms, Multiple PrimaryEpithelioid CellsTumor Necrosis Factor-alphaLeiomyosarcomaMutationStomach NeoplasmsIleal NeoplasmsTomography, X-Ray ComputedIntestinal NeoplasmsIndolesProtein Kinase InhibitorsCarcinoid TumorTreatment OutcomeNeoplasms, Complex and MixedSarcomaCarney ComplexCell ProliferationWilms TumorLeiomyomaAntigens, CD34DNA Mutational AnalysisPrognosisNeoplasm MetastasisNeurofibromatosis 1Neoplasms, ExperimentalGenes, Tumor SuppressorTumor MicroenvironmentDigestive System Surgical ProceduresGranulosa Cell TumorGastrectomyNeoplasm ProteinsAdenocarcinomaTumor Suppressor Protein p53Disease ProgressionMesenchymal Stromal CellsS100 ProteinsDisease-Free SurvivalOvarian NeoplasmsNeurilemmomaKidney NeoplasmsGastroscopyLiver NeoplasmsRetrospective StudiesDNA, NeoplasmPeritoneal NeoplasmsOmentumNeuroendocrine TumorsSignal TransductionReverse Transcriptase Polymerase Chain ReactionTumor Suppressor ProteinsNeoplasm StagingRNA, MessengerBrain NeoplasmsNeovascularization, PathologicGene Expression Regulation, NeoplasticXenograft Model Antitumor AssaysInterstitial Cells of CajalLaparotomyExonsKi-67 AntigenMixed Tumor, MalignantEndosonographyMammary Neoplasms, ExperimentalNeoplasmsPositron-Emission TomographyDrug Resistance, NeoplasmNeoplasm Recurrence, LocalSoft Tissue NeoplasmsTime FactorsTransplantation, HeterologousCells, CulturedCorneal StromaPancreatic NeoplasmsBone Marrow CellsMice, Inbred C57BLMice, Inbred BALB CVimentin