RT Book, Section A1 Tefferi, Ayalew A2 Valle, David L. A2 Antonarakis, Stylianos A2 Ballabio, Andrea A2 Beaudet, Arthur L. A2 Mitchell, Grant A. SR Print(0) ID 1181418076 T1 The Classic Myeloproliferative Neoplasms: Chronic Myelogenous Leukemia, Polycythemia Vera, Essential Thrombocythemia, and Primary Myelofibrosis T2 The Online Metabolic and Molecular Bases of Inherited Disease YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN 9780071459969 LK ommbid.mhmedical.com/content.aspx?aid=1181418076 RD 2023/11/28 AB The classic myeloproliferative neoplasms, including chronic myelogenous leukemia (CML), polycythemia vera (PV), essential thrombocythemia (ET), and primary myelofibrosis (PMF), are a phenotypically diverse category of malignancies that are derived from stem cells in the myeloid lineage.The first genetic alteration recognized as a cause of myeloproliferative disease was the translocation that creates the BCR-ABL gene fusion. Recently, activating mutations in JAK2 and MPL have been found in the majority of BCR-ABL-negative myeloproliferative neoplasms. Recurrent mutations in these genes provide clinically useful diagnostic markers.Implicated by mutational evidence, the JAK-STAT pathway is a rational target for drug development. A number of anti-JAK2 drugs have undergone preclinical testing, and some of these have been introduced into clinical trials.