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An Exercise in Extrapolation: Clinical Management of Atypical CML, MDS/MPN-Unclassifiable, and MDS/MPN-RS-T

  • Myelodysplastic Syndromes (D Steensma, Section Editor)
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Abstract

According to the recently published 2016 World Health Organization (WHO) classification of myeloid malignancies, myelodysplastic/myeloproliferative neoplasms (MDS/MPN) include atypical chronic myeloid leukemia (aCML), MDS/MPN-unclassifiable (MDS/MPN-U), chronic myelomonocytic leukemia (CMML), juvenile myelomonocytic leukemia (JMML), and MDS/MPN ring sideroblasts with thrombocytosis (MDS/MPN-RS-T). MDS/MPN-RS-T was previously a provisional category known as refractory anemia with ring sideroblasts with thrombocytosis (RARS-T) which has now attained a distinct designation in the 2016 WHO classification. In this review, we focus on biology and management of aCML, MDS/MPN-U, and MDS/MPN-RS-T. There is considerable overlap between these entities which we attempt to further elucidate in this review. We also discuss recent advances in the field of molecular landscape that further defines and characterizes this heterogeneous group of disorders. The paucity of clinical trials available secondary to unclear pathogenesis and rarity of these diseases makes the management of these entities clinically challenging. This review summarizes some of the current knowledge of the molecular pathogenesis and suggested treatment guidelines based on the available data.

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References

  1. Sochacki AL, Fischer MA, Savona MR. Therapeutic approaches in myelofibrosis and myelodysplastic/myeloproliferative overlap syndromes. Onco Targets Ther. 2016;9:2273–86.

    PubMed  PubMed Central  Google Scholar 

  2. Arber DA et al. The 2016 revision to the World Health Organization classification of myeloid neoplasms and acute leukemia. Blood. 2016;127(20):2391–405.

    Article  PubMed  Google Scholar 

  3. Sallman DA, Padron E. Transformation of the clinical management of CMML patients through in-depth molecular characterization. Clin Lymphoma Myeloma Leuk. 2015;15(Suppl):S50–5.

    Article  PubMed  Google Scholar 

  4. Harada Y, Harada H. Chronic myelomonocytic leukemia (CMML): recent advances in molecular pathogenesis and treatment. Rinsho Ketsueki. 2016;57(2):147–55.

    PubMed  Google Scholar 

  5. Adachi S, Nakahata T. Diagnosis and treatment of juvenile myelomonocytic leukemia (JMML). Nihon Rinsho. 2001;59(12):2401–6.

    CAS  PubMed  Google Scholar 

  6. Koike K, Matsuda K. Molecular mechanism and progress in treatment of juvenile myelomonocytic leukemia (JMML). Rinsho Ketsueki. 2013;54(6):538–44.

    PubMed  Google Scholar 

  7. Sakashita K. Juvenile myelomonocytic leukemia (JMML): recent advances in molecular pathogenesis and treatment. Rinsho Ketsueki. 2016;57(2):137–46.

    PubMed  Google Scholar 

  8. Zoi K, Cross NC. Molecular pathogenesis of atypical CML, CMML and MDS/MPN-unclassifiable. Int J Hematol. 2015;101(3):229–42.

    Article  CAS  PubMed  Google Scholar 

  9. Bacher U et al. Distribution of cytogenetic abnormalities in myelodysplastic syndromes, Philadelphia negative myeloproliferative neoplasms, and the overlap MDS/MPN category. Ann Hematol. 2009;88(12):1207–13.

    Article  PubMed  Google Scholar 

  10. Meggendorfer M et al. SETBP1 mutations occur in 9% of MDS/MPN and in 4% of MPN cases and are strongly associated with atypical CML, monosomy 7, isochromosome i(17)(q10), ASXL1 and CBL mutations. Leukemia. 2013;27(9):1852–60.

    Article  CAS  PubMed  Google Scholar 

  11. Bellesso M et al. Atypical chronic myeloid leukemia with t(9;22)(p24,11.2), a BCR-JAK2 fusion gene. Rev Bras Hematol Hemoter. 2013;35(3):218–9.

    PubMed  PubMed Central  Google Scholar 

  12. Muta T, Osaki K, Yamano Y. Translocation t(9;22) (p23;q11) in atypical chronic myeloid leukemia (aCML) presenting osteolytic lesions. Int J Hematol. 2002;76(4):344–8.

    Article  PubMed  Google Scholar 

  13. Xu Y et al. A BCR-JAK2 fusion gene from ins(22;9)(q11;p13p24) in a patient with atypical chronic myeloid leukemia. Leuk Lymphoma. 2013;54(10):2322–4.

    Article  PubMed  Google Scholar 

  14. Wang SA et al. Atypical chronic myeloid leukemia is clinically distinct from unclassifiable myelodysplastic/myeloproliferative neoplasms. Blood. 2014;123(17):2645–51.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  15. Gotlib J et al. The new genetics of chronic neutrophilic leukemia and atypical CML: implications for diagnosis and treatment. Blood. 2013;122(10):1707–11.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  16. Piazza R et al. Recurrent SETBP1 mutations in atypical chronic myeloid leukemia. Nat Genet. 2013;45(1):18–24.

    Article  CAS  PubMed  Google Scholar 

  17. Breccia M et al. Identification of risk factors in atypical chronic myeloid leukemia. Haematologica. 2006;91(11):1566–8.

    PubMed  Google Scholar 

  18. Hernandez JM et al. Clinical, hematological and cytogenetic characteristics of atypical chronic myeloid leukemia. Ann Oncol. 2000;11(4):441–4.

    Article  CAS  PubMed  Google Scholar 

  19. Martiat P, Michaux JL, Rodhain J. Philadelphia-negative (Ph-) chronic myeloid leukemia (CML): comparison with Ph + CML and chronic myelomonocytic leukemia. The Groupe Francais de Cytogenetique Hematologique. Blood. 1991;78(1):205–11.

    CAS  PubMed  Google Scholar 

  20. Kurzrock R et al. BCR rearrangement-negative chronic myelogenous leukemia revisited. J Clin Oncol. 2001;19(11):2915–26.

    CAS  PubMed  Google Scholar 

  21. Maxson JE et al. Oncogenic CSF3R mutations in chronic neutrophilic leukemia and atypical CML. N Engl J Med. 2013;368(19):1781–90.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  22. Maxson JE et al. The colony-stimulating factor 3 receptor T640N mutation is oncogenic, sensitive to JAK inhibition, and mimics T618I. Clin Cancer Res. 2016;22(3):757–64.

    Article  CAS  PubMed  Google Scholar 

  23. Geyer JT, Orazi A. Myeloproliferative neoplasms (BCR-ABL1 negative) and myelodysplastic/myeloproliferative neoplasms: current diagnostic principles and upcoming updates. Int J Lab Hematol. 2016;38(1):12–9. doi:10.1111/ijlh.12509.

  24. Gambacorti-Passerini CB et al. Recurrent ETNK1 mutations in atypical chronic myeloid leukemia. Blood. 2015;125(3):499–503.

    Article  CAS  PubMed  Google Scholar 

  25. Hoischen A et al. De novo mutations of SETBP1 cause Schinzel-Giedion syndrome. Nat Genet. 2010;42(6):483–5.

    Article  CAS  PubMed  Google Scholar 

  26. Khanna V et al. Durable disease control with MEK inhibition in a patient with NRAS-mutated atypical chronic myeloid leukemia. Cureus. 2015;7(12):e414.

    PubMed  PubMed Central  Google Scholar 

  27. Cortes J et al. Results of imatinib mesylate therapy in patients with refractory or recurrent acute myeloid leukemia, high-risk myelodysplastic syndrome, and myeloproliferative disorders. Cancer. 2003;97(11):2760–6.

    Article  CAS  PubMed  Google Scholar 

  28. Koldehoff M et al. Outcome of hematopoietic stem cell transplantation in patients with atypical chronic myeloid leukemia. Bone Marrow Transplant. 2004;34(12):1047–50.

    Article  CAS  PubMed  Google Scholar 

  29. DiNardo CD et al. Myelodysplastic/myeloproliferative neoplasms, unclassifiable (MDS/MPN, U): natural history and clinical outcome by treatment strategy. Leukemia. 2014;28(4):958–61.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  30. Chaudhury A et al. Prognosis and outcomes in MDS-MPN unclassifiable: single institution experience of a rare disorder. Blood. 2015;126(23):1698.

    Google Scholar 

  31. Alchalby H, Kroger N. Allogeneic stem cell transplant vs. Janus kinase inhibition in the treatment of primary myelofibrosis or myelofibrosis after essential thrombocythemia or polycythemia vera. Clin Lymphoma Myeloma Leuk. 2014;14 Suppl:S36–41.

    Article  PubMed  Google Scholar 

  32. Eghtedar A et al. Phase 2 study of the JAK kinase inhibitor ruxolitinib in patients with refractory leukemias, including postmyeloproliferative neoplasm acute myeloid leukemia. Blood. 2012;119(20):4614–8.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  33. Cherington C et al. Allogeneic stem cell transplantation for myeloproliferative neoplasm in blast phase. Leuk Res. 2012;36(9):1147–51.

    Article  PubMed  Google Scholar 

  34. Steensma DP, Tefferi A. JAK2 V617F and ringed sideroblasts: not necessarily RARS-T. Blood. 2008;111(3):1748.

    Article  CAS  PubMed  Google Scholar 

  35. Papaemmanuil E et al. Somatic SF3B1 mutation in myelodysplasia with ring sideroblasts. N Engl J Med. 2011;365(15):1384–95.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  36. Effenberger KA et al. Interchangeable SF3B1 inhibitors interfere with pre-mRNA splicing at multiple stages. RNA. 2016;22(3):350–9.

    Article  CAS  PubMed  Google Scholar 

  37. Broseus J et al. Age, JAK2(V617F) and SF3B1 mutations are the main predicting factors for survival in refractory anaemia with ring sideroblasts and marked thrombocytosis. Leukemia. 2013;27(9):1826–31.

    Article  CAS  PubMed  Google Scholar 

  38. Jeromin S et al. Refractory anemia with ring sideroblasts and marked thrombocytosis cases harbor mutations in SF3B1 or other spliceosome genes accompanied by JAK2V617F and ASXL1 mutations. Haematologica. 2015;100(4):e125–7.

    Article  PubMed  PubMed Central  Google Scholar 

  39. Broseus J et al. Low rate of calreticulin mutations in refractory anaemia with ring sideroblasts and marked thrombocytosis. Leukemia. 2014;28(6):1374–6.

    Article  CAS  PubMed  Google Scholar 

  40. Klampfl T et al. Somatic mutations of calreticulin in myeloproliferative neoplasms. N Engl J Med. 2013;369(25):2379–90.

    Article  CAS  PubMed  Google Scholar 

  41. Broseus J et al. Clinical features and course of refractory anemia with ring sideroblasts associated with marked thrombocytosis. Haematologica. 2012;97(7):1036–41.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  42. Cazzola M et al. Biologic and clinical significance of somatic mutations of SF3B1 in myeloid and lymphoid neoplasms. Blood. 2013;121(2):260–9.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  43. Cortelazzo S et al. Hydroxyurea for patients with essential thrombocythemia and a high risk of thrombosis. N Engl J Med. 1995;332(17):1132–6.

    Article  CAS  PubMed  Google Scholar 

  44. Huls G et al. Efficacy of single-agent lenalidomide in patients with JAK2 (V617F) mutated refractory anemia with ring sideroblasts and thrombocytosis. Blood. 2010;116(2):180–2.

    Article  CAS  PubMed  Google Scholar 

  45. Ziarkiewicz M et al. Refractory anaemia with ringed sideroblasts associated with marked thrombocytosis (RARS-T) with superimposed 5q-syndrome. Pol J Pathol. 2010;61(2):105–9.

    PubMed  Google Scholar 

  46. Taylor G, Culligan D, Vickers MA. Refractory anemia with ring sideroblasts associated with marked thrombocytosis complicated by massive splenomegaly treated with lenalidomide resulting in resolution of splenomegaly but severe and prolonged pancytopenia. Case Rep Hematol. 2013;2013:718480.

    PubMed  PubMed Central  Google Scholar 

  47. Savona MR et al. An international consortium proposal of uniform response criteria for myelodysplastic/myeloproliferative neoplasms (MDS/MPN) in adults. Blood. 2015;125(12):1857–65.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

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Correspondence to Eric Padron.

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Chetasi Talati and Eric Padron each declare no potential conflict of interest.

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This article does not contain any studies with human or animal subjects performed by any of the authors.

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This article is part of the Topical Collection on Myelodysplastic Syndromes

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Talati, C., Padron, E. An Exercise in Extrapolation: Clinical Management of Atypical CML, MDS/MPN-Unclassifiable, and MDS/MPN-RS-T. Curr Hematol Malig Rep 11, 425–433 (2016). https://doi.org/10.1007/s11899-016-0350-1

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  • DOI: https://doi.org/10.1007/s11899-016-0350-1

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