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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7952717PMC
http://dx.doi.org/10.1038/s41408-021-00449-9DOI Listing

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Distribution of different classes of CSF3R mutations and co-mutational pattern in 360 myeloid neoplasia.

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January 2025

Department of Laboratory Medicine and Pathology, Diagnostic Hematology and Clinical Genomics, Azienda Ospedaliero-Universitaria, Policlinico, and AUSL Modena, Italy.

The colony-stimulating factor 3 receptor (CSF3R) plays an essential role in differentiation, growth, and survival of granulocytes. Driver mutations in CSF3R gene represent a diagnostic marker of chronic neutrophilic leukemia (CNL). Less commonly, these mutations are observed in other myeloid neoplasms but their pathogenetic and prognostic role is still unclear.

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CNL is a rare subtype of MPNs characterized by persistent neutrophilia, bone marrow hypercellularity, and specific genetic mutations, particularly in the gene. Advances in molecular diagnostics have greatly enhanced our understanding of CNL, distinguishing it from other myeloproliferative disorders and refining diagnostic criteria. This review provides an updated overview of CNL, focusing on breakthroughs in genetic profiling, including novel mutations with potential prognostic value and implications for targeted therapy.

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Chronic neutrophilic leukemia (CNL) is a rare myeloproliferative neoplasm (MPN) characterized by peripheral blood neutrophilia, marrow granulocyte hyperplasia, hepatosplenomegaly, and driver mutations in the colony-stimulating factor 3 receptor (CSF3R). Designation of activating CSF3R mutations as a defining genomic abnormality for CNL has led to increased recognition of the disease. However, the natural history of CNL remains poorly understood with most patients reported being of older age, lacking germline data, and having poor survival, in part due to transformation to acute leukemia.

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CSF3R activating mutation is a genetic hallmark of chronic neutrophilic leukemia (CNL), and is also present in a subset of atypical chronic myeloid leukemia (aCML), but infrequent in other myeloid neoplasms. However, the occurrence of CSF3R mutations in various myeloid neoplasms is not well studied. Here we evaluate the spectrum of CSF3R mutations and the clinicopathologic features of CSF3R mutated myeloid neoplasms.

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