Immunoglobulin M, (IgM)
Collect SST or plain red top/send 1.0 mL serum.
Room temp: 14 days, Refrigerated: 14 days, Frozen: 14 days
Evaluate humoral immunity; establish the diagnosis and monitor therapy in macroglobulinemia of Waldenstrom or plasma cell myeloma. IgM levels are used to evaluate likelihood of in utero infections or acuteness of infection.