A monoclonal spike in the gamma region on serum protein electrophoresis is most suggestive of which condition category?

A monoclonal spike in the gamma region on serum protein electrophoresis is most suggestive of which condition category?

• A. Gammopathy
• B. Acute inflammation
• C. Cirrhosis
• D. Dehydration

Answer: (A)

A monoclonal spike in the gamma region means a single clone of plasma cells is overproducing one type of immunoglobulin. The gamma region on serum protein electrophoresis is where most immunoglobulins migrate, so a sharp, narrow peak reflects a monoclonal gammopathy caused by a clonal expansion—classic for conditions like multiple myeloma, MGUS, or Waldenström macroglobulinemia. In contrast, acute inflammation tends to raise many different immunoglobulids together, producing a broad, polyclonal increase rather than a distinct spike. Cirrhosis can cause immune activation with polyclonal gammopathy, and dehydration alters total protein levels but not the clonal pattern. So the pattern described most specifically points to a gammopathy. Further testing, such as immunofixation, would identify the specific immunoglobulin involved and guide next steps.

A monoclonal spike in the gamma region means a single clone of plasma cells is overproducing one type of immunoglobulin. The gamma region on serum protein electrophoresis is where most immunoglobulins migrate, so a sharp, narrow peak reflects a monoclonal gammopathy caused by a clonal expansion—classic for conditions like multiple myeloma, MGUS, or Waldenström macroglobulinemia. In contrast, acute inflammation tends to raise many different immunoglobulids together, producing a broad, polyclonal increase rather than a distinct spike. Cirrhosis can cause immune activation with polyclonal gammopathy, and dehydration alters total protein levels but not the clonal pattern. So the pattern described most specifically points to a gammopathy. Further testing, such as immunofixation, would identify the specific immunoglobulin involved and guide next steps.