Analysis of real-world data demonstrating the efficacy of current management of polycythaemia vera in attaining and maintaining therapeutic haematocrit

Background Polycythaemia vera (PV) is a Philadelphia-negative myeloproliferative neoplasm, typically driven by acquired JAK2 mutation and characterised by elevated red cell mass and increased risk of thrombotic events. Patients are managed with phlebotomy to maintain haematocrit (Hct) < 0.45, and patients stratified as 'high risk' for thrombosis are additionally treated with cytoreductive agents to attain this target. Study This analysis of newly diagnosed JAK2 mutant PV patients ( n = 50) over 2 years aimed to determine how effectively patients attained and maintained target Hct according to recommended practice. Conclusions We found that patients spent the majority of time in target Hct range. Findings are supportive of current management guidelines.