Study of JAK2V617F Positive Essential Thrombocythemia Patients Progressing to Polycythemia Vera and Comparative Outcomes

What this Trial Is About

This research is an international multicenter retrospective observational study focusing on patients with Essential Thrombocythemia ET who are positive for the JAK2V617F mutation. It aims to understand the progression from ET to Polycythemia Vera PV and compare clinical outcomes between those who progressed and those who did not, using criteria defined by the International consensus classification of myeloid neoplasms and acute leukemias from 2022. The study consists of two parts a nested case-control study and a comparative retrospective cohort study. The first part compares ET patients who progressed to PV with matched ET patients who did not progress, based on diagnosis year, age at diagnosis, and disease duration. The second part compares patients diagnosed with de novo PV without prior ET to the ET-to-PV cases, again matched by diagnosis year, age, and disease duration. All patients included in the study were diagnosed by the end of 2020 to allow at least 5 years of follow-up. Participants will have their medical histories reviewed retrospectively to analyze clinical data up to the baseline and at the time of progression. Researchers will assess phenotypic changes and clinical outcomes between groups, with no new treatments or interventions administered. The study is observational and aims to gather information from existing records to better understand disease evolution over time.

A ELN-Multicenter Study on Phenotypic Evolution and Clinical Outcomes