Multiple myeloma

Key facts Myeloma is a type of cancer that affects your plasma cells. Myeloma cancer builds up in your bone marrow, affecting your immune system and bone health. The cause of myeloma is not known — it cannot be prevented or cured. Treatments include chemotherapy and stem cell transplant. Additional treatments, such as radiotherapy, are often also needed. What is myeloma? Multiple myeloma, or myeloma, is a type of cancer that affects your plasma cells. Plasma cells are a type of white blood cell that help fight infection as part of your immune system. Plasma cells are not the same