Multiple myeloma is a bone marrow cancer in which plasma cells have become cancerous. Plasma cells, a type of white blood cell, are an essential part of the immune system. They make antibodies, a type of protein, that help fight infections.

Hematologist and oncologist Sarah Holstein, MD, PhD, is leading a nationwide study to test the effectiveness of a new placentaderived natural killer (NK) cell therapy.

AL amyloidosis, or light chain amyloidosis, is a rare disorder involving abnormal plasma cells in the bone marrow.