The overproduction of plasma cells causes an increase in antibodies.

The plasma cells also may cause the bone to break down.

The plasma cells can collect in the bone to make small tumors called plasmacytomas.

Multiple myeloma is a cancer that begins in plasma cells, a type of white blood cell.

As a result, there is a characteristic normal distribution of plasma cells in the blood by molecular weight.

The diagnosis rests primarily on the presence of plasma cells.

The abnormal plasma cells often form tumors in bones or soft tissues of the body.

The abnormal plasma cells produce M protein that may be found during a routine blood or urine test.

Beta-2-microglobulin is a protein found on the surface of plasma cells.

Multiple myeloma is a type of cancer involving the plasma cells.