Multiple Myeloma is a cancer of the plasma cells (fluid) of the blood. The cells of the plasma divide and form genetically damaged cancer cells. These defected cells accumulate in the bone marrow and form tumours in the bones of the body. This disease is mostly found in patients over the age of 60, but can also be found in younger patients. It is not clear what causes this disease, but it can be hereditary (from a brother or sister who has MM), or from being exposed to radiation. The type of treatment depends on the individual patient, and how much the disease has spread. Treatment options include chemotherapy, biological and targeted drugs and radiation therapy.