Immunoglobulin M (IgM) in urine, measured by electrophoresis

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like frequent urination, blood in urine, swelling in legs or ankles, or if they suspect conditions like multiple myeloma, kidney disease, or certain infections. It can also be used to track how well a treatment is working for conditions affecting urine proteins.

What to Expect Before the Test

No special preparation is usually needed. You may be asked to collect a urine sample in a clean container. If you’re using certain medications or have health conditions, let your provider know before the test.

What the Test Results Mean

Abnormal levels of IgM in urine could indicate conditions such as kidney disease, infections (like urinary tract infections), or certain cancers. High levels might also suggest immune system disorders. Your provider will interpret results in the context of your overall health and symptoms.

Common Conditions Monitored

This test is often used to diagnose or monitor conditions like multiple myeloma (a cancer of plasma cells), kidney diseases (such as glomerulonephritis), or infections that cause abnormal protein presence in urine.