monoclonal B-cell lymphocytosis

Definition / meaning of monoclonal B-cell lymphocytosis

A condition in which a higher-than-normal number of identical B cells are found in the blood. People with monoclonal B-cell lymphocytosis may develop other B-cell diseases, such as chronic lymphocytic leukemia (CLL). Also called MBL.

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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