Determination of V617F-JAK2-mutation in chronic myeloproliferative syndromes
About a case
Abstract
Polycythemia vera (PV), essential thrombocythemia (ET–TE) and idiopathic myelofibrosis (IM-MI) are clonal myeloproliferative disorders characterized by an excessive proliferation of one or more myeloids lineage such as erythrocits, platelets and fibroblasts of bone marrow.
Precise categorization of myeloproliferative syndromes still need to be debated even if diagnostic criteria are strict; additionally these disorders are difficult to differentiate from reactive processes.
Recently, in 2005, JAK2-mutation was identified in many of those entities. Sequencing of the coding region of JAK2 revealed a G to T transversion at position 1849, that changed a valine to a phenylalanine (JAK2 V617F).
Incidence of V617F-JAK2-mutation was almost 90% in patients with PV, and 50% in patients with IM and ET.
In this study we describe the detection of the V617F-JAK2-mutation in a patient suspected of PV using allele-specific polymerase chain reaction analysis (PCR) and we discuss the importance of the mutation for diagnosis and treatment of negative BCR-ABL myeloproliferative syndromes.
References
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