Myeloma is a cancer of plasma cells in the bone marrow. Bone marrow is a spongy material inside our bones. The main bones it’s in are the hip bones, breastbone, arm bones, leg bones, ribs and spine. Bone marrow is part of the immune system, which protects us from infection and disease.
Bone marrow and stem cells
Bone marrow produces stem cells. These are immature cells that develop into three different types of blood cell:
red blood cells, which carry oxygen to all the cells in the body
platelets, which help the blood to clot and control bleeding