When Plasma cells begin to divide out of control and becomes cancerous, it develops into LPL, which is an indolent form of Lymphoma, which is slow-growing. This has to do with the white blood cells.
These LPL cells also release too much of an antibody called, IgM into the blood stream. This condition is called, Waldenstrom Macoglobulinemia.
This addition with the cancer causes a severe danger of a thickening of the blood. As with all anemias, they cause fatique, headaches, confusion, dizziness, loss of coordination, and internal and external excessive bleeding or hermoraging. If this thickening is not treated it will cause the heart to fail.