Have you also tested for free Kappa light chains? We have seen this oligoclonal pattern before, particularly in elderly patients. In the absence of free light chains we presume they are isomeric products from the same clone.
Mario D'Costa Ph.D. FCACB
Director of Clinical Chemistry and Core Lab
St. Joseph's Health Centre, Toronto
Assistant Professor, University of Toronto
Tel: 416-530-6263
Fax: 416-530-6559
Email: [log in to unmask]
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