• Rev Med Interne · Jun 2023

    Review

    Large granular lymphocyte leukemia: An indolent clonal proliferative disease associated with an array of various immunologic disorders.

    • G Drillet, C Pastoret, A Moignet, T Lamy, and T Marchand.
    • Service d'hématologie clinique, centre hospitalier universitaire de Rennes, Rennes, France. Electronic address: gaelle.drillet@chu-rennes.fr.
    • Rev Med Interne. 2023 Jun 1; 44 (6): 295306295-306.

    AbstractLarge granular lymphocyte leukemia (LGLL) is a chronic lymphoproliferative disorder characterized by the proliferation of T or NK cytotoxic cells in the peripheral blood, the spleen and the bone marrow. Neutropenia leading to recurrent infections represents the main manifestation of LGLL. One specificity of LGLL is its frequent association with auto-immune disorders, among them first and foremost rheumatoid arthritis, and other hematologic diseases, including pure red cell aplasia and bone marrow failure. The large spectrum of manifestations and the classical indolent course contribute to the diagnosis difficulties and the frequency of underdiagnosed cases. Of importance, the dysimmune manifestations disappear with the treatment of LGLL as the blood cell counts normalize, giving a strong argument for a pathological link between the two entities. The therapeutic challenge results from the high rate of relapses following the first line of immunosuppressive drugs. New targeted agents, some of which are currently approved in autoimmune diseases, appear to be relevant therapeutic strategies to treat LGLL, by targeting key activated pathways involved in the pathogenesis of the disease, including JAK-STAT signaling.Copyright © 2023. Published by Elsevier Masson SAS.

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