1. Multiple myeloma : Causes, incidence, and risk factors  (Trust Mark: Doctor-Reviewed)
Plasma cells help the body's immune system fight disease by producing substances called antibodies. In multiple myeloma, plasma cells grow out of control and form tumors in the bone marrow. The excess growth of plasma cells interferes with the bod...• Reviewer: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

2. Multiple Myeloma  (Trust Mark: Doctor-Reviewed)
Multiple myeloma is a cancer in which antibody-producing plasma cells grow in an uncontrolled and invasive (malignant) manner.• Author: Margaret Alic Ph.D.