JAK2 and acquired polycythemia vera: Regarding genetic findings, the presence of JAK2 V617F+ was more frequent in patients with PV (58.9%, p = 0.020) (Fig. 2a), and a variant allele frequency (VAF) of ≥ 50% was also more common in patients with this hematologic condition (41%, p = 0.005) (Fig. 2b).