Spinal cancer. Magnetic resonance imaging (MRI) scan of a section through the lumbosacral region of the spine of a 64-year-old female patient, showing multiple lesions in the lumbar and thoracic vertebrae. These lesions are indicative of multiple myeloma (bone marrow cancer), also known as plasma cell myeloma or Kahler's disease, a cancer of plasma cells, a type of white blood cell normally responsible for producing antibodies.