Abstract
Introduction: Leukemic transformation (LT) of both Philadelphia (Ph) -positive and -negative myeloprolifetarive neoplasms (MPNs) is a well-known subject. However sufficient data are not available in literature from Turkey about the frequency of second malignancies (SMs) except LT in patients with MPNs. In this study, it was aimed to investigate the frequency of SMs in Ph-positive or -negative MPN cases. Materials and Methods: A total of 438 patients diagnosed with classical MPN according to WHO 2008 diagnostic criteria were included in the study.Results: SMs were detected in 15 out of 438 patients (3.4%). In this study, cancer incidence rate was found higher (1149.8/100.000 person-years for males and 540.8/100.000 person-years for females with MPNs) compared with Turkey data. Conclusion: SM frequency is significantly higher than normal population in patients with MPNs. Therefore these patients should be carefully examined for SM symptoms and signs.
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