RESUMEN
BACKGROUND: BCR-ABL negative myeloproliferative neoplasms (MPN) include polycythemia Vera (PV), essential thrombocythemia (ET) and primitive myelofibrosis (PMF). the JAK2 V617F mutation has been introduced since 2008 as a major diagnostic criterion on the one hand and on the other hand, it would be linked to increased risk of thrombotic complications. AIM: This study aimed to evaluate the association of JAK2 mutation and thrombotic events in MPN. METHODS: A retrospective study concerning 45 BCR-ABL negative MPN patients (mean age=53 old years, sex ratio=0.8) was conducted. RESULTS: They were classified as PV (22 patients), ET (17 patients), PMF (3 patients) and atypical MPN (3 patients). The JAK2 mutation was found in 64.4% of patients: 72.7% of PV patients, 47% of ET patients and 66.7% of PMF patients. Thrombotic events were recorded in 11 patients (24.4%). Cerebral arteries and portal vein were the most frequent localizations. The JAK2 mutation was an independent risk factor of thrombotic events. CONCLUSION: Consequently, it seems that screening for JAK2 mutation in BCR-ABL negative MPN could play a role in identifying patients at high risk of vascular complications.