Menu Healthy Lifestyle Diseases & Conditions First Aid Symptoms Tests & Procedures Videos Definitions FAQs Multiple myelomaUpdated: 2017-06-13OverviewMultiple myeloma is cancer of the plasma cells, a type of white blood cell in the bone marrow. A group of plasma cells becomes cancerous and multiplies. The disease can damage the bones, immune system, kidneys, and red blood cell count.TreatmentsTreatments include medications, chemotherapy, corticosteroids, radiation, or a stem cell transplant. © 1998-2022 Mayo Foundation for Medical Education and Research(MFMER). All rights reserved. Terms of Use