Myeloproliferative neoplasms (MPNs) are a group of clonal hematopoietic disorders which categorized according to the World Health Organization (WHO) into Philadelphia Chromosome positive (Ph +ve) including chronic myeloid leukemia (CML) and Philadelphia Chromosome negative (Ph -ve) like essential thrombocythemia (ET), polycythaemia vera (PV), and primary myelofibrosis (PMF) .
the aim of the study is to Detection of leukocyte cell population data in patients with MPNs and Relation between leukocyte cell population and patients' clinical status.
Patients with MPNs according to the recent WHO classification.
Patients with other types of myeloid neoplasms and/or not fulfil the WHO criteria for MPNs diagnosis.