@barbarian1 and @cousinvinney, elevated ImmunoGlobulinM antibodies indicate infection, inflammation, and/or various blood disorders (normal is around 40-250). M spike is different than IGM; it is a measure of monoclonal antibodies in the blood. As in the case of an M spike (0.1 to 0.4 g/dL is detection limit so if yours is 0.056 g/dl it is OK) results need to be evaluated by the oncologist because individual numbers can have multiple causes. https://my.clevelandclinic.org/health/body/igm This link is for MM, but it does explain various blood and other test results and normal ranges: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://themmrf.org/wp-content/uploads/2023/07/Learn-Your-Labs_patient-toolkit.pdf