Persistent lymphocytic leukemia (CLL) is often a lymphoid malignancy characterized by the proliferation and accumulation of mature CD5+ B cells in the blood, bone marrow and lymphoid tissues. The analysis of CLL involves the existence of ≥5 x109/L mono - clonal B cells of typical phenotype in the blood. CMD368 https://stepheno531kta8.wikijournalist.com/user