The Lambda Light Chain (Lambda Light Chain, Serum) test is used to measure the levels of lambda light chains in the blood. These chains are components of antibodies produced by the immune system. This test is an important tool in evaluating certain health conditions such as lymphoma, multiple myeloma, and other immune-related disorders. Elevated levels of lambda light chains may indicate underlying health issues that require further investigation, such as abnormal proliferation of immune cells. It is recommended to perform this test in the context of clinical symptoms or previous results to provide a comprehensive evaluation.