Charakterystyka kliniczna i diagnostyka molekularna nadpłytkowości i nadkrwistości u dzieci

According to WHO classification, classic myeloproliferative neoplasms (MPN) without Philadelphia chromosome include polycythemia vera (PV), essential thrombocythemia (ET) and primary myelofibrosis (PMF). The discoveries in recent years revealed molecular causes of these diseases. These include mutations in JAK2 (V617F, exon 12), MPL and CALR genes. MPN are rarely diagnosed in children, and the molecular basis of these disorders is not well understood. In the first part of this review, we describe diagnostic criteria and therapy of PV and ET. Most cases of erythrocytosis and thrombocytosis in children are reactive and warrant a thorough differential diagnosis.