Myelodysplastic SyndromesMyeloproliferative DisordersJanus Kinase 2Anemia, RefractoryMyelodysplastic-Myeloproliferative DiseasesPrimary MyelofibrosisAnemia, Refractory, with Excess of BlastsLeukemia, Myelomonocytic, ChronicPolycythemia VeraThrombocythemia, EssentialSyndromeLeukemia, Myeloid, AcuteReceptors, ThrombopoietinBone Marrow NeoplasmsLeukemia, MyeloidBone MarrowChromosomes, Human, Pair 5Anemia, SideroblasticThrombocytosisAzacitidineLeukemia, Myeloid, Chronic, Atypical, BCR-ABL NegativeMutationKaryotypingChromosome AberrationsLeukemia, Myelomonocytic, JuvenileMonosomyPreleukemiaPrognosisThalidomideLeukemiaHematopoietic Stem CellsChromosomes, Human, Pair 7Bone Marrow DiseasesHematologic NeoplasmsPancytopeniaAnemia, AplasticBone Marrow CellsTreatment OutcomeBlast CrisisCytogenetic AnalysisProto-Oncogene Proteins c-cblAcute DiseaseLeukemia, Myelogenous, Chronic, BCR-ABL PositiveChromosome DeletionSplenomegalyNeoplasms, Second PrimaryGranulocyte Precursor CellsHematologyDNA Mutational AnalysisMyeloid Progenitor CellsDisease ProgressionHematopoietic Stem Cell TransplantationMegakaryocytesTrisomyCytogeneticsAntimetabolites, AntineoplasticIron OverloadDown SyndromePhiladelphia ChromosomeCell Transformation, NeoplasticErythrocyte TransfusionAntigens, CD34HematopoiesisMegakaryocyte-Erythroid Progenitor CellsHematologic AgentsErythropoietinAntineoplastic AgentsSurvival AnalysisTransplantation, HomologousChromosomes, Human, Pair 8Bone Marrow ExaminationChelation TherapyBlood Cell CountTranslocation, GeneticJanus KinasesCytarabineMutation, MissenseHematologic DiseasesThrombocytopeniaIn Situ Hybridization, FluorescenceBlood TransfusionChromosomes, Human, Pair 20Core Binding Factor Alpha 2 SubunitSurvival RateRemission InductionMegakaryocyte Progenitor CellsMetabolic Syndrome XSTAT5 Transcription FactorRetrospective StudiesErythroid Precursor CellsTransplantation ConditioningPoint MutationChromosome DisordersGranulocyte Colony-Stimulating FactorBone Marrow TransplantationVidarabineSweet SyndromeAnemia, MacrocyticCase-Control StudiesFlow Cytometry