Primary MyelofibrosisPolycythemia VeraThrombocythemia, EssentialJanus Kinase 2Myeloproliferative DisordersHematopoiesis, ExtramedullarySplenomegalyThrombocytosisReticulinOsteosclerosisMegakaryocytesBone MarrowReceptors, ThrombopoietinOsteoarthropathy, Primary HypertrophicPancytopeniaThrombopoietinPipobromanPyrazolesAnemia, MyelophthisicSplenectomyHepatomegalyJanus Kinase 1PolycythemiaLeukemia, Megakaryoblastic, AcuteBone Marrow ExaminationPlatelet CountThorium DioxideThrombocytopeniaAnemiaMutationDanazolSpleenJanus KinasesThalidomideFatal OutcomeMyelodysplastic-Myeloproliferative DiseasesHematologyMethenoloneBone Marrow NeoplasmsLeukemia, Myeloid, Chronic, Atypical, BCR-ABL NegativeHematopoietic Stem CellsHypereosinophilic SyndromeAntigens, CD34Protein Kinase InhibitorsGATA1 Transcription FactorEtretinateBlood Cell CountKaryotyping