Large granular lymphocytic (LGL) leukemia is a rare, chronic, lymphoproliferative disorder of cytotoxic T cell or natural killer cell lineage with an annual incidence of 0.72 cases per 1 million people in the U.S.1 The most common subtype of LGL leukemia, T-LGL leukemia, follows an indolent disease course and accounts for approximately 85% of cases….
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