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International Journal of Endocrinology
Volume 2012, Article ID 712425, 7 pages
http://dx.doi.org/10.1155/2012/712425
Review Article

Interpretation of Hormone Levels in Older Patients: Points for Consideration

Clinical Biochemistry Department, College of Medicine, Jagiellonian University, Wielicka Street 265, 30-663 Kracow, Poland

Received 2 December 2011; Revised 20 February 2012; Accepted 9 March 2012

Academic Editor: Huan Cai

Copyright © 2012 Krystyna Sztefko and Patrycja Szybowska. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Blood hormone and tumor marker concentrations are usually determined by immunochemical methods which are based on an unique reaction between antigen and assay capture antibody. Despite the speed and simplicity of assays performance on automatic immunochemistry platforms, the interpretation of final results requires a deep knowledge of method fallibility. General lack of immunoassays standardization, presence of cross-reacting substances in patient’s sample, limitation of free hormones measurement due to abnormal analyte binding protein concentrations, assay interferences due to patient’s autoantibodies, and heterophilic antibodies, as well as proper interpretation of very low- and very high-sample analyte levels, are the main points discussed in respect to hormones and tumor markers measurement in geriatric population.