STAT3 and T-cell large granular lymphocyte leukemia: When comparing IHA LGLL with the remainder of the cohort, our analysis revealed a greater incidence of NK-LGLL cases among IHA patients (25% vs. 8%, p = 0.01), higher rates of STAT3 mutations (31% vs. 22%, p = 0.08), MGUS (40% vs. 9%, p = 0.0001), and polyclonal hypergammaglobulinemia (22% vs. 8%, p = 0.02) (Fig. 2B).