DNA Immunoglobulin G (IgG) Free Light Chains (Serum)

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like unexplained fatigue, frequent infections, bone pain, or if they suspect conditions such as multiple myeloma, lymphoma, or other immune-related diseases. It may also be used to monitor treatment progress or check for abnormal protein levels in your blood.

What to Expect Before the Test

No special preparation is needed for this test. You may have a small needle inserted into a vein in your arm to draw blood. It usually takes a few minutes, and you may feel a brief pinch. If you have a hard time with needles, let your provider know so they can help make it more comfortable.

What the Test Results Mean

The test measures the amount of free light chains in your serum. High levels may suggest conditions like multiple myeloma or other disorders affecting antibody production. Your results will be compared to a reference range provided by your healthcare provider, who will interpret them in the context of your overall health and symptoms.

Common Conditions Monitored

This test is often used to diagnose or monitor conditions such as multiple myeloma, where abnormal plasma cells produce too many light chains. It can also help detect other conditions like Waldenström macroglobulinemia or other lymphoproliferative disorders.