Myeloma Myeloma is cancer of the plasma cells. Plasma cells are white blood cells that produce disease- and infection-fighting antibodies in your body. Myeloma cells produce an overabundance of antibodies that do not provide protection against infection. This is different than healthy plasma cells that contribute different antibodies to your immune system to fight infection. The multiplication of myeloma cells also interferes with the normal production and function of red and white blood ... Myeloma (sometimes known as multiple myeloma) is a type of cancer that affects the blood and bone marrow . Bone marrow, which is found inside bones, is where blood cells are made. Myeloma happens when your bone marrow makes certain blood cells (plasma cells) that do not work properly. Find out about the symptoms, causes, tests to diagnose and treatment for myeloma . This includes chemotherapy, targeted treatments, stem cell transplant (intensive treatment), and current research. Learn about myeloma , including its types, symptoms, causes, diagnosis, and treatment options. Gain insights into managing this complex blood cancer.