ArticleCase reports in oncology
A Case of Myeloproliferative Neoplasm with Eosinophilia Associated with PCM1-JAK2 Rearrangement.
Article in Case reports in oncology. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: The PCM1-JAK2 rearrangement is generated through the t(8; 9)(p22; p24) translocation event. The myeloid/lymphoid neoplasms with eosinophilia (MLN-eo) with PCM1-JAK2 rearrangement is the common types of MLN-eo with tyrosine kinase fusion genes (MLN-Eo-tk). MLN-Eo with PCM1-JAK2 rearrangement is a rare disease with a poor prognosis and no unified treatment guidelines. The response of disease to ruxolitinib may be transient and it may only serve as a temporary treatment prior to transplantation. Case Presentation: We report 1 patient diagnosed with MLN-Eo with PCM1-JAK2 rearrangement who exhibited resistance to ruxolitinib, subsequently received pegylated interferon (Peg-IFN) and lenalidomide. The Peg-IFN was discontinued due to adverse effects; the patient has been receiving lenalidomide monotherapy for a duration exceeding 2 years, achieving complete hematologic remission and molecular response, significant amelioration of symptoms, as well as regression of hepatosplenomegaly. Conclusion: A case of MLN-Eo with PCM1-JAK2 rearrangement underwent continuous oral lenalidomide monotherapy for over 2 years. The patient achieved complete hematologic remission and molecular response during the long-term follow-up; however, a complete molecular remission was not attained. The underlying mechanism of lenalidomide in these diseases necessitates further comprehensive investigation through fundamental research and clinical trials.
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