DSG3 and acquired polycythemia vera: Patients with PV possess IgG auto Abs mainly against desmoglein 3 (anti-Dsg3 autoAbs) or anti-Dsg3 and anti-Dsg1 autoAbs (Sinha and Sajda, 2018; Walter et al., 2019), while patients with PF have anti-Dsg 1 autoAbs (Russo et al., 2017; Oktarina et al., 2019).