RT Journal Article SR Electronic T1 Monoclonal gammopathy of undetermined significance: A primary care guide JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 39 OP 46 DO 10.3949/ccjm.86a.17133 VO 86 IS 1 A1 Khouri, Jack A1 Samaras, Christy A1 Valent, Jason A1 Garcia, Alex Mejia A1 Faiman, Beth A1 Mathur, Saveta A1 Hamilton, Kim A1 Nakashima, Megan A1 Kalaycio, Matt YR 2019 UL http://www.ccjm.org/content/86/1/39.abstract AB Monoclonal gammopathy of undetermined significance (MGUS) is commonly diagnosed in outpatients being worked up for an array of clinical concerns. It carries a risk of progression to myeloma and other lymphoproliferative disorders that, albeit low (1% per year), warrants regular follow-up. Patients with MGUS can be risk-stratified on the basis of the amount and type of their monoclonal protein as well as whether they have an abnormal light-chain ratio. Here, we provide a guide to the diagnosis, workup, and management of MGUS.