[Laboratory identification of monoclonal immunoglobin]

Area of Science:

• Clinical Biochemistry
• Immunology
• Hematology

Context:

• Laboratory diagnostics for monoclonal gammopathies have seen substantial advancements in the past decade.
• Current diagnostic methods face challenges in definition and interpretation.
• The study reviews established and emerging techniques for monoclonal gammopathy detection.

Purpose:

• To provide an overview of current laboratory diagnostic methods for monoclonal gammopathies.
• To discuss the significance, challenges, and interpretation of these diagnostic techniques.
• To highlight advancements in electrophoresis and free light chain assays.

Summary:

• Agarose and capillary electrophoresis are primary clinical-biochemical methods.
• Immunofixation electrophoresis has superseded immunoelectrophoresis for immunoglobulin and paraprotein light chain typing due to its superior sensitivity and speed.
• Determining free light chain concentration is crucial for diagnosing conditions like non-secretory myeloma and AL amyloidosis.
• The combination of beta2-microglobulin and albumin offers a simple yet highly informative prognostic factor.
• Serum viscosity determination and cryoglobulin identification complete the diagnostic workup.

Impact:

• Improved diagnostic accuracy and efficiency for monoclonal gammopathies.
• Enhanced understanding of the role of free light chains in specific hematologic disorders.
• Provides a framework for selecting the most informative prognostic markers in monoclonal gammopathy management.