Multiple myeloma (also known as myelomatosis or myeloma) is a cancer in which there is abnormal growth in the number of plasma cells in the bone-marrow and blood. This can suppress the normal production of blood cells, including those associated with the body's immune system. The plasma cells may collect in the bone to make small tumors known as plasmacytomas. Multiple myeloma is most common in people aged over 60, and is less frequent before the age of 40.
See Multiple Myeloma Links in Guide to Internet Resources for Cancer.