Gastrointestinal Stromal TumorsProto-Oncogene Proteins c-kitBenzamidesGastrointestinal NeoplasmsPiperazinesPyrimidinesReceptor, Platelet-Derived Growth Factor alphaStromal CellsLeukemia, Myelogenous, Chronic, BCR-ABL PositiveAntineoplastic AgentsMesenchymomaFusion Proteins, bcr-ablNeoplasms, Connective TissuePyrrolesEpithelioid CellsMitotic IndexDuodenal NeoplasmsLeukemiaLeiomyosarcomaImmunohistochemistryGenes, ablLeukemia, Myeloid, AcuteMutationIleal NeoplasmsProtein Kinase InhibitorsJejunal NeoplasmsNeoplasms, Multiple PrimaryTumor Markers, BiologicalIntestinal NeoplasmsIndolesSex Cord-Gonadal Stromal TumorsStomach NeoplasmsTomography, X-Ray ComputedDNA Mutational AnalysisDigestive System Surgical ProceduresDrug Resistance, NeoplasmPrognosisAntigens, CD34Treatment OutcomeNeurofibromatosis 1Protein-Tyrosine KinasesSarcomaCarney ComplexGastrectomyLeiomyomaDisease-Free SurvivalCell Line, TumorExonsInterstitial Cells of CajalEndosonographyProto-Oncogene Proteins c-bcrLaparotomyTumor BurdenRetrospective StudiesNeurilemmomaSomatostatinomaLeukemia, ExperimentalNeoplasm ProteinsLeukemia, Lymphocytic, Chronic, B-CellS100 ProteinsDNA, NeoplasmLeiomyoma, EpithelioidDisease ProgressionK562 CellsGastroscopyLeukemia, LymphoidCell ProliferationBlast CrisisGene Expression Regulation, NeoplasticPositron-Emission TomographyPeritoneal NeoplasmsEndoscopy, GastrointestinalElectron Transport Complex IISignal TransductionSurvival RatePhiladelphia ChromosomeOmentumDouble-Balloon EnteroscopyPelvic NeoplasmsNeurofibrosarcomaIncidental FindingsKi-67 AntigenSurvival AnalysisNeoplasm MetastasisSoft Tissue NeoplasmsIntestine, SmallIn Situ Hybridization, FluorescenceGastrointestinal HemorrhageSuccinate DehydrogenaseProto-Oncogene Proteins c-ablHemoperitoneumBase SequenceNeoadjuvant TherapyFollow-Up StudiesNeoplasm Recurrence, LocalBiopsy, NeedleLiver NeoplasmsLethargyMolecular Sequence DataApoptosis