Trial Parameters
Brief Summary
This is a single-arm, single-center study aims to recruit 40 participants with Essential Thrombocythemia (ET) and Polycythemia Vera (PV). Eligible participants will receive a subcutaneous injection of Peginterferon α-2b 180 mcg once a week and follow-up，and efficacy and safety will be evaluated.
Eligibility Criteria
Inclusion Criteria: 1. Meet the 2016 WHO diagnostic criteria for ET (Essential Thrombocythemia) and PV (Polycythemia Vera) * ET (Essential Thrombocythemia) major criteria: 1. Platelet count \> 450 \* 10\^9/L; (2) Bone marrow biopsy shows marked megakaryocytic proliferation with increased mature megakaryocyte volume and increased nuclear lobulation. There is no significant granulocytic proliferation, left shift, or erythroid proliferation, with grade 1 fibrosis observed in a few cases; (3) Does not meet the WHO diagnostic criteria for BCR-ABL1+ CML, PV, PMF, MDS, or other myeloproliferative neoplasms; (4) JAK2, CALR, or MPL mutation positive. Secondary criteria: (1) Presence of a clonal marker or absence of evidence for reactive thrombocytosis. The diagnosis of ET requires the fulfillment of all four main criteria, or the first three main criteria plus one secondary criterion. * PV (Polycythemia Vera) main criteria: (1) Hemoglobin \> 16.5 g/dL in males, \> 16 g/dL in females, or Hematoc