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  • Title: Case report: granulocyte colony-stimulating factor overcomes severe neutropenia of large granular lymphocytosis.
    Author: Walls J, Dessypris EN, Krantz SB.
    Journal: Am J Med Sci; 1992 Dec; 304(6):363-5. PubMed ID: 1280908.
    Abstract:
    Large granular lymphocytosis (LGL) is characterized by enhanced proliferation of T lymphocytes that have antibody-dependent cell-mediated cytotoxicity or natural killer cell activity and that often produce severe cytopenias, including neutropenia. When a 68-year-old man with seropositive rheumatoid arthritis and severe neutropenia was examined, he was found to have LGL with a T cell gene rearrangement, indicating the presence of a clonal population of T lymphocytes. The patient was admitted with a fever of 102 degrees F and a nonhealing ulcer over the right tibia. When the infection did not respond to intravenous antibiotics, granulocyte colony-stimulating factor (GCSF) therapy was started at 5 micrograms/kg subcutaneously each day. The neutrophil count promptly increased and the patient subsequently defervesced and was able to have a skin graft placed, which healed without difficulty. GCSF, which is known to be an effective therapeutic agent for neutropenia associated with chemotherapy and bone marrow transplantation, also was a very valuable treatment for the life-threatening neutropenia of LGL.
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