[Monoclonal gammopathies: from MGUS to multiple myeloma].

Monoclonal plasma cell gammopathies (MPCG) describe several forms of abnormal plasma cell proliferation. Their prevalence increases with age. Initially asymptomatic, MPCG can evolve differently and they can tend towards more advanced stages, sometimes associated with severe complications. Most patients are diagnosed by their general practitioner, who then offers a joint follow-up with the specialist. It therefore seems important to review the diagnostic and therapeutic management of MPCG, as well as their potential complications and treatments adverse effects.