Ruxolitinib in Myelofibrosis Patients in Lombardy, Italy

Observational, Retrospective and Prospective Study on the Use of Ruxolitinib in Myelofibrosis Patients in Lombardy, Italy

The RUXOREL-MF observational study includes patients with primary and post-essential thrombocythemia/post-polycythemia vera myelofibrosis (MF) being treated with the oral JAK1-/JAK2-inhibitor ruxolitinib in a "real world" setting. Patients are treated according to current indications in Italy (i.e., primary and secondary MF patients with intermediate-1, intermediate-2, and high risk IPSS (International Prognostic Scoring System) scores and symptomatic splenomegaly and/or systemic symptoms). Patients are treated at facilities pertaining to the regional Hematology Network of Lombardy (Rete Ematologica Lombarda) in Italy. Efficacy data, data related to infectious and vascular events, data related to second primary malignancies, data regarding disease progression/transformation, and molecular information in relationship to ruxolitinib treatment will be collected and analyzed.

Inclusion Criteria:

• Age >= 18 years
• Diagnosis of primary myelofibrosis diagnosis according to the WHO 2016 classification or post-essential thrombocythemia/post-polycythemia vera myelofibrosis according to the IWG-MRT 2008 classification
• Patients with an intermediate-1, intermediate-2, or high risk score according to the IPSS (International Prognostic Scoring System)
• Patients treated with ruxolitinib in accordance with current indications in Italy
• Patients eligible or ineligible to hematopoietic stem cell transplant or who have already undergone a hematopoietic stem cell transplant

Exclusion Criteria:

• Diagnoses other than primary myelofibrosis or post-essential thrombocythemia/post-polycythemia vera myelofibrosis
• Patients treated with ruxolitinib having a platelet count at treatment initiation <50 x10^9/L
• Patients treated with ruxolitinib for conditions other than primary myelofibrosis or post-essential thrombocythemia/post-polycythemia vera myelofibrosis