ArticleCancer genomics & proteomics
Complex Genetic Evolution and Treatment Challenges in Myeloid Neoplasms: A Case of Persistent t(2;3)(p15~23;q26)/
Article in Cancer genomics & proteomics. 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
BACKGROUND/
aimMyelodysplastic syndromes (MDSs) are clonal bone marrow disorders characterized by ineffective hematopoiesis. They are classified based on morphology and genetic alterations, with SF3B1 variants linked to favorable prognosis and MECOM rearrangements associated with poor outcomes. The combined effects of these alterations remain unclear. We report an MDS patient carrying both SF3B1 and MECOM alterations who developed transient eosinophilia accompanied by a TNIP1::PDGFRB chimera in a subset of MECOM-affected cells. CASE REPORT: A 73-year-old woman was diagnosed with myeloid neoplasia with excess blasts and multilineage dysplasia (MDS-EB1). Six months later, SF3B1 mutations were identified, leading to a diagnosis of MDS-SF3B1. Despite azacitidine treatment, her condition worsened, showing hypercellular bone marrow and eosinophilia. Genetic analysis revealed a t(2;3)(p15~23;q26)/MECOM rearrangement and TNIP1::PDGFRB chimera. Imatinib eradicated eosinophilia and reduced TNIP1::PDGFRB-positive cells, but the MECOM-clone persisted. Subsequent treatments, including hydroxyurea, mercaptopurine, and low-dose cytarabine, were ineffective. FLT3 mutations and high EVI1 transcript levels were later detected. The patient succumbed to progressive disease.
conclusionThis case highlights the complexity of MDS and the importance of genetic abnormalities in treatment planning. Persistent MECOM rearrangement and the TNIP1::PDGFRB chimera emphasize the need for further research into resistance mechanisms.
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