Relationship between JAK2-V617F mutation and hematologic parameters in Philadelphia-negative chronic myeloproliferative neoplasms

Abstract

Objectives: We aimed to investigate the prevalence of JAK2-V617F mutation and its association with hematologic parameters in polycythemia vera(PV), essential thrombocytosis( ET) and primary myelofibrosis(PMF) patients who have been tested for the mutation. Methods: We retrospectively reviewed the records of 168 patients (82 males and 86 females) who were tested for JAK2-V617F mutation upon request of Hematology Clinic. JAK2-V617F mutation status, white blood cell (WBC) counts, platelet (PLT) counts, hemoglobin (Hb), hematocrit (Hct) levels and demographics of the patients were recorded. Results: JAK2-V617F mutation was detected in 55.9% of the 168 patients. The mutation was observed in 58.2% of PV cases, in 54.4% of ET and in 54.5% of PMF cases. All patients were divided into two groups: Mutation positive and negative. Age, WBC and PLT levels were significantly higher in mutation positive group (p<0.05). Age, WBC, Hb, Hct and PLT counts in PV cases with JAK2-V617F mutation, age and WBC counts in PMF cases with JAK2-V617F mutation were found to be significantly higher compared to mutation negative patients (p<0.05). Conclusion: JAK2-V617F mutation is a very important parameter in diagnostic and prognostic evaluation. Thus, every patient suspected of having a myeloproliferative neoplasm should be screened for JAK2-V617F mutation.