Cell, plasma
A type of white blood cell that produces and secretes antibodies. A plasma cell is a fully differentiated lymphocyte in the B-cell (not the T-cell) lineage. As with most cell types, plasma cells can mutate to give rise to cancer. Plasma cell malignancies include multiple myeloma, Waldenstrom macroglobulinemia, and plasma cell leukemia.

Medical dictionary. 2011.

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