I'm a 70 yo woman with celiac (15 years), brand new stage 3a chronic kidney disease, and MGUS (8 years). So far none of these limit me. They likely will give you blood and DEXA (bone scans) for MGUS. Elevated immunoglobulin IgA is an inflammation marker, as is Beta Globulin. My IgA Kappa free light chain of 300 mg/L and IgA of 376 is associated with MGUS. Some people have Lambda free light chain or other brands of MGUS. MGUS is asymptomatic and has a 1%/year risk of progressing to multiple myeloma so for most people it stays as asymptomatic MGUS. https://www.mayoclinic.org/diseases-conditions/mgus/symptoms-causes/syc-20352362