Serum Free Light Chain test is to detect, diagnose, and monitor plasma cell disorders (dyscrasias) such as multiple myeloma, primary amyloidosis, and related diseases or to monitor the effectiveness of treatment.
When you have bone pain, fractures, anemia (with normal size and shape red blood cells (normocytic)), kidney disease, and recurrent infections that your healthcare practitioner suspects are due to a plasma cell disorder; when you are being treated for a plasma cell disorder.