Abstract
Serum or plasma protein electrophoresis is often performed in clinical laboratories to detect and monitor M-components. During the last decade, capillary electrophoresis (CE) has emerged as an interesting alternative to traditional analysis of serum, plasma and urine proteins by agarose gel electrophoresis. We here report a case of pseudoparaproteinemia detected by capillary electrophoresis after Omnipaque™ (iohexol) infusion in a patient with normal kidney function. It is important for the laboratories to be aware of this source of erroneous results and not misclassify it as monoclonal gammopathies.
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