One-size-fits-all approach no good for low-risk ET

Patients with JAK2V617F-positive ET should receive antiplatelet therapy rather than undergoing observation, as antiplatelet therapy may reduce the risk of thrombosis in these patients and does not pose an increased risk of bleeding.

However, in JAK2V617F-positive patients with concomitant cardiovascular risk factors and/or leukocytosis, antiplatelet therapy may not be sufficient. These patients might be candidates for cytoreductive therapy, especially if they have marked thrombocytosis.