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Clonal hematopoiesis in large granular lymphocytic leukemia
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Clonal hematopoiesis in large granular lymphocytic leukemia
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Journal Article
Clonal hematopoiesis in large granular lymphocytic leukemia
2025
Overview
Past studies described occasional patients with myeloid neoplasms (MN) and coexistent large granular lymphocytic leukemia (LGLL) or T-cell clonopathy of unknown significance (TCUS), which may represent expansion of myeloid clonal hematopoiesis (CH) as triggers or targets of clonal cytotoxic T cell reactions. We retrospectively analyzed 349 LGLL/TCUS patients, 672 MN patients, and 1443 CH individuals to establish the incidence, genetic landscape, and clinical phenotypes of CH in LGLL. We identified 8% of cases overlapping with MN, while CH was found in an additional 19% of cases (CH + /LGLL) of which TET2 (23%) and DNMT3A (14%) were the most common. In MN cohort, 3% of cases showed coexistent LGLL. The incidence of CH in LGLL was exceedingly higher than age-matched CH controls (P < 0.0001). By multivariate analysis, the presence of CH in LGLL (P = 0.026) was an independent risk factor for cytopenia in addition to older age (P = 0.003), splenomegaly (P = 0.015) and STAT3/5B mutations (P = 0.001). CH + /LGLL cases also showed a higher progression rate to MN than CH-/LGLL (10% vs. 2% at 5 years; P = 0.02). A close relationship between CH and LGLL suggests that cytopenia in LGLL may be not only related to LGLL but be also secondary to coexisting clonal cytopenia of unclear significance.
Publisher
Nature Publishing Group,Springer Nature
