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Clinical Chemistry and Laboratory Medicine (CCLM)

Published in Association with the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM)

Editor-in-Chief: Plebani, Mario

Ed. by Gillery, Philippe / Greaves, Ronda / Lackner, Karl J. / Lippi, Giuseppe / Melichar, Bohuslav / Payne, Deborah A. / Schlattmann, Peter


IMPACT FACTOR 2017: 3.556

CiteScore 2017: 2.34

SCImago Journal Rank (SJR) 2017: 1.114
Source Normalized Impact per Paper (SNIP) 2017: 1.188

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1437-4331
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Volume 54, Issue 6

Issues

Is accuracy of serum free light chain measurement achievable?

Joannes F.M. Jacobs
  • Corresponding author
  • Radboud University Medical Center, Department of Laboratory Medicine, Laboratory Medical Immunology, Geert Grooteplein 10 (route 469), 6525 GA Nijmegen, The Netherlands
  • Email
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Jillian R. Tate
  • Pathology Queensland, Department of Chemical Pathology, Royal Brisbane and Women’s Hospital, Herston, Qld, Australia
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Giampaolo Merlini
  • Department of Molecular Medicine, University of Pavia, Amyloidosis Research and Treatment Center, Pavia, Scientific Institute Policlinico San Matteo, Pavia, Italy
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2015-12-07 | DOI: https://doi.org/10.1515/cclm-2015-0879

Abstract

The serum free light chain (FLC) assay has proven to be an important complementary test in the management of patients with monoclonal gammopathies. The serum FLC assay has value for patients with plasma cell disorders in the context of screening and diagnosis, prognostic stratification, and quantitative monitoring. Nonetheless, serum FLC measurements have analytical limitations which give rise to differences in FLC reporting depending on which FLC assay and analytical platform is used. As the FLC measurements are incorporated in the International Myeloma Working Group guidelines for the evaluation and management of plasma cell dyscrasias, this may directly affect clinical decisions. As new certified methods for serum FLC assays emerge, the need to harmonise patient FLC results becomes increasingly important. In this opinion paper we provide an overview of the current lack of accuracy and harmonisation in serum FLC measurements. The clinical consequence of non-harmonized FLC measurements is that an individual patient may or may not meet certain diagnostic, prognostic, or response criteria, depending on which FLC assay and platform is used. We further discuss whether standardisation of serum FLC measurements is feasible and provide an overview of the steps needed to be taken towards harmonisation of FLC measurements.

Keywords: free light chains; harmonisation; monoclonal gammopathy; M-protein; plasma cell dyscrasia; standardisation

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About the article

Corresponding author: Joannes F.M. Jacobs, PhD, MD, Radboud University Medical Center, Department of Laboratory Medicine, Laboratory Medical Immunology, Geert Grooteplein 10 (route 469), 6525 GA Nijmegen, The Netherlands, Phone: +31 (0)24-3617414, Fax: +31 (0)24-3619415


Received: 2015-09-10

Accepted: 2015-11-06

Published Online: 2015-12-07

Published in Print: 2016-06-01


Citation Information: Clinical Chemistry and Laboratory Medicine (CCLM), Volume 54, Issue 6, Pages 1021–1030, ISSN (Online) 1437-4331, ISSN (Print) 1434-6621, DOI: https://doi.org/10.1515/cclm-2015-0879.

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