[Determination of light chains in serum]

Area of Science:

• Immunology
• Clinical Chemistry

Context:

• Free light chains (FLC) of immunoglobulin, also known as Bence Jones protein, are crucial biomarkers.
• A commercially available serum free light chain (sFLC) assay became available in 2001.
• The diagnostic utility of sFLC analysis in monoclonal plasma cell disorders is increasingly recognized.

Purpose:

• To evaluate the role of serum free light chain (sFLC) analysis in the diagnosis and monitoring of monoclonal plasma cell disorders.
• To highlight the potential of sFLC analysis as a supplementary diagnostic tool.

Summary:

• Serum free light chain (sFLC) analysis measures immunoglobulin free light chains, which are identical to Bence Jones protein.
• Evidence supports sFLC analysis as a valuable tool for diagnosing and monitoring patients with monoclonal plasma cell disorders.
• Several aspects require further investigation for optimal integration of sFLC analysis into routine clinical practice.

Impact:

• sFLC analysis offers a powerful method to supplement existing diagnostic tools for plasma cell disorders.
• Optimizing the use of sFLC analysis can enhance patient management and diagnostic accuracy.
• Continued research is essential to address unsolved aspects and maximize the clinical utility of sFLC testing.