Prefibrotic/early primary myelofibrosis (pre‐PMF) and essential thrombocythemia (ET) exhibited different features of bone marrow; however, this is not always easy to judge objectively, making pathologists’ distinction often suboptimal. In the… Click to show full abstract
Prefibrotic/early primary myelofibrosis (pre‐PMF) and essential thrombocythemia (ET) exhibited different features of bone marrow; however, this is not always easy to judge objectively, making pathologists’ distinction often suboptimal. In the WHO 2008 criteria, pre‐PMF was not defined as a subgroup of PMF; therefore, affected patients were at a higher risk of misdiagnosis with ET. In this study, we examined the prevalence of pre‐PMF patients among those previously diagnosed with ET in Japan.
               
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