Myelodysplastic SyndromesMyeloproliferative DisordersJanus Kinase 2Primary MyelofibrosisMyelodysplastic-Myeloproliferative DiseasesPolycythemia VeraThrombocythemia, EssentialSyndromeAnemia, RefractoryLeukemia, Myelomonocytic, ChronicReceptors, ThrombopoietinBone Marrow NeoplasmsAnemia, Refractory, with Excess of BlastsLeukemia, Myeloid, AcuteThrombocytosisLeukemia, MyeloidLeukemia, Myeloid, Chronic, Atypical, BCR-ABL NegativeBone MarrowMutationLeukemia, Myelomonocytic, JuvenileAnemia, SideroblasticLeukemiaChromosomes, Human, Pair 5Proto-Oncogene Proteins c-cblHematologic NeoplasmsSplenomegalyHematopoietic Stem CellsLeukemia, Myelogenous, Chronic, BCR-ABL PositiveKaryotypingBlast CrisisChromosome AberrationsAzacitidinePrognosisPhiladelphia ChromosomeDown SyndromeBone Marrow DiseasesPreleukemiaMonosomyHematologyDNA Mutational AnalysisTreatment OutcomeBone Marrow CellsMyeloid Progenitor CellsJanus KinasesChromosomes, Human, Pair 7Acute DiseaseThalidomideCell Transformation, NeoplasticSTAT5 Transcription FactorMegakaryocytesMegakaryocyte Progenitor CellsMetabolic Syndrome XDisease ProgressionMegakaryocyte-Erythroid Progenitor CellsMutation, MissenseTranslocation, GeneticNeoplasms, Second PrimaryChromosome DeletionPancytopeniaCytogenetic AnalysisAnemia, AplasticFusion Proteins, bcr-ablClonal EvolutionMyelopoiesisAntineoplastic AgentsProto-Oncogene ProteinsGranulocyte Precursor CellsAmino Acid SubstitutionPoint MutationHematopoiesisProtein Kinase InhibitorsTrisomyCytogeneticsCore Binding Factor Alpha 2 SubunitHematopoietic Stem Cell TransplantationOncogene Proteins, FusionGene Knock-In TechniquesPhenotypeChromosomes, Human, Pair 8NeoplasmsAntigens, CD34Cell ProliferationAntimetabolites, AntineoplasticDNA-Binding ProteinsNephrotic SyndromeSurvival AnalysisIn Situ Hybridization, FluorescenceExonsPolymerase Chain ReactionErythropoietinCase-Control StudiesIron OverloadCohort StudiesRetrospective StudiesCytarabinePrecursor Cell Lymphoblastic Leukemia-LymphomaSjogren's SyndromeLeukemia, Myelomonocytic, AcuteChromosomes, Human, Pair 20Bone Marrow Examination