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B-Cell Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma (B-CLL/SLL) Definition of Disease B-cell chronic lymphocytic leukemia (B-CLL) is a clonal disorder of mature B lymphocytes, which are characterized by small, round nuclei; highly condensed chromatin; inconspicuous nucleoli; scant cytoplasm; and unique immunophenotype.…