Chronic B-cell malignancies are routinely characterized as B-cell clonal diseases that have signs and symptoms primarily related to the continuing expansion of these cells. This review discusses chronic lymphocytic leukemia, multiple myeloma and hairy cell leukemia from the perspective of secondary abnormalities in non-malignant cells. Thus, our main purpose is to elaborate on the alterations/abnormalities of the immunoregulatory (IR) cells in these diseases and focus on the qualitative and quantitative aspects of T-cells, natural killer (NK) cells and monocytes. The relevance of the IR-cell changes to the basic disease process and their complications are emphasized.
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