The Bence-Jones protein is similar to L-chains. When you check this out, this is actually the way that it looks like. This is something that can be found in the urine that will determine if the person has multiple myeloma. Those who have this condition can get abnormal amounts of Bence-Jones protein in their urine.
Take note that multiple myeloma is a condition that is considered to be treatable but this is not a curable type of cancer. There are different therapies that can be done in order to treat it but there is no guarantee that it will ever go away. There are some who are able to live longer due to chemotherapy and stem cell therapy.