Myelodysplastic SyndromesMyeloproliferative DisordersJanus Kinase 2Primary MyelofibrosisMyelodysplastic-Myeloproliferative DiseasesPolycythemia VeraThrombocythemia, EssentialAnemia, RefractoryBone MarrowLeukemia, Myelomonocytic, ChronicBone Marrow NeoplasmsReceptors, ThrombopoietinAnemia, Refractory, with Excess of BlastsLeukemia, Myeloid, AcuteThrombocytosisBone Marrow CellsSyndromeLeukemia, Myeloid, Chronic, Atypical, BCR-ABL NegativeLeukemia, MyeloidBone Marrow TransplantationAnemia, SideroblasticLeukemia, Myelomonocytic, JuvenileMutationHematopoietic Stem CellsChromosomes, Human, Pair 5Bone Marrow DiseasesHematologic NeoplasmsProto-Oncogene Proteins c-cblSplenomegalyLeukemiaLeukemia, Myelogenous, Chronic, BCR-ABL PositiveAzacitidineKaryotypingBlast CrisisPhiladelphia ChromosomePrognosisChromosome AberrationsHematologyPreleukemiaMonosomyMyeloid Progenitor CellsMegakaryocytesBone Marrow ExaminationAnemia, AplasticTreatment OutcomeJanus KinasesDNA Mutational AnalysisThalidomidePancytopeniaMegakaryocyte Progenitor CellsSTAT5 Transcription FactorChromosomes, Human, Pair 7HematopoiesisMegakaryocyte-Erythroid Progenitor CellsCell Transformation, NeoplasticDisease ProgressionAcute DiseaseCytogenetic AnalysisMutation, MissenseClonal EvolutionHematopoietic Stem Cell TransplantationNeoplasms, Second PrimaryChromosome DeletionMyelopoiesisTransplantation, HomologousAntigens, CD34Fusion Proteins, bcr-ablGranulocyte Precursor CellsAmino Acid SubstitutionAntineoplastic AgentsGene Knock-In TechniquesPoint MutationProtein Kinase InhibitorsCytogeneticsDown SyndromeGranulocytesCell ProliferationProto-Oncogene ProteinsColony-Forming Units AssayErythropoietinBlood Cell CountTrisomyTranslocation, GeneticNeoplasmsAntimetabolites, AntineoplasticSurvival AnalysisHematologic DiseasesChromosomes, Human, Pair 8Flow CytometryPhenotypeErythroid Precursor CellsIron OverloadThrombocytopeniaErythrocyte TransfusionCytarabineMice, Inbred C57BLIn Situ Hybridization, FluorescenceGranulocyte Colony-Stimulating FactorChromosomes, Human, Pair 20Polymerase Chain Reaction