D47: Other neoplasms of uncertain or unknown behaviour of lymphoid, haematopoietic and related tissue

D47.2: Monoclonal gammopathy of undetermined significance (MGUS)

The immune system protects the body from pathogens and foreign substances. The immune system can also destroy cells in the body that have pathologically changed. Some of the immune system’s antibodies can make pathogens and foreign substances visible to the immune system. Other antibodies attack pathogens or foreign substances directly.

You have too much of a certain antibody. This means that you usually don’t have any symptoms at first. However, it is possible that a blood cell disease will develop later.