Abstract
The BCR-ABL1-negative myeloproliferative neoplasms (MPN) share an increased risk of thrombotic and hemorrhagic complications. Risk factors for hemorrhage are less well defined than those for thrombosis. Because patients with CALR mutations have higher platelet counts compared to JAK2 V617F-mutated patients, bleeding rates may be increased in this group. Our aim was to retrospectively evaluate whether acquired von Willebrand disease (AvWD), thrombocytosis, mutational status, or treatment history are associated with bleeding in a cohort of MPN patients. Using an electronic database, MPN patients seen between 2005 and 2013 were retrospectively identified using ICD-9 codes and billing records. A bleeding event was defined as one that was identified in the medical record and graded based on the Common Terminology Criteria for Adverse Event (CTCAE) version 4.0. Among 351 MPN patients, 15.6 % experienced 64 bleeding event types. There was no association of bleeding with mutational status, gender, MPN subtype, aspirin use, prior thrombosis, or platelet count at presentation. There was an association between bleeding and older age at diagnosis. aVWD was identified in six patients. In this single-center retrospective study, bleeding events were identified in 15 % of patients, and associated with older age at diagnosis. aVWD was rarely tested for in this cohort.
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Acknowledgments
The authors wish to acknowledge and thank David Dittmann, who assisted with CALR mutation analysis and Dr. David Green for his critical review of our manuscript.
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E. M. Kander and S. Raza contributed equally to the work.
This research was presented, in part, at the 56th American Society of Hematology Annual Meeting and Exposition, December 6–9, 2014, San Francisco, California.
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Kander, E.M., Raza, S., Zhou, Z. et al. Bleeding complications in BCR-ABL negative myeloproliferative neoplasms: prevalence, type, and risk factors in a single-center cohort. Int J Hematol 102, 587–593 (2015). https://doi.org/10.1007/s12185-015-1871-4
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DOI: https://doi.org/10.1007/s12185-015-1871-4