TRGC1 and T-cell large granular lymphocyte leukemia: In three of those 6 patients (patients 1, 3, and 6) with LGL lymphocytosis ranging from 0.9 to 1.4 × 109/L, a clearly monoclonal rearrangement of TCRB and TCRG genes as well as typical for T-LGL leukemia immunophenotype were found.