A quantitative immunoglobulin test measures the blood levels of antibodies called immunoglobulins. The various immunoglobulins found in the blood include IgA, IgD, IgE, IgG, or IgM. Multiple myeloma patients may have high levels of one type of immunoglobulin as well as low levels of another type of immunoglobulin.
Quantitative serum immunoglobulin tests give important information about the health of an individual’s immune system. Doctors will use Ig tests to help diagnose various conditions and diseases that affect the levels of one or more immunoglobulin classes, such as multiple myeloma. Physicians will also order this test if a patient is showing symptoms indicative of an immunoglobulin deficiency.
Learn more about multiple myeloma testing in the Multiple myeloma knowledge center.