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Annual Report on the External Quality Assessment Scheme for Tumor Markers in Korea (2017)
J Lab Med Qual Assur 2018;40:70-76
Published online June 30, 2018
© 2018 Korean Association of External Quality Assessment Service.

Sang Hoon Song

Department of Laboratory Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
Correspondence to: Sang Hoon Song
Department of Laboratory Medicine, Seoul National University Hospital, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul 03080, Korea
Tel: +82-2-2072-3326
Fax: +82-2-747-0359
E-mail: cloak21@snu.ac.kr
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
In 2017, the tumor marker program of the Korean Association of External Quality Assessment Service was performed for tumor markers I and II. Tumor marker I comprised alphafetoprotein (AFP), carcinoembryonic antigen, protein induced by vitamin K absence-II, and prostate specific antigen (PSA), and tumor marker II comprised cancer antigen (CA) 125, CA 19-9, CA 15-3, CA 72-4, and beta-2-microglobulin. Two challenges were conducted with three pooled serum or control materials, except for the first tumor marker I challenge. In total, 648 institutions participated in tumor marker I and 380 in tumor marker II programs. The response rates were 92.9%97.0%. The coefficients of variation (CVs) were different depending on tests and samples, and average CVs were 3.7%16.8%. The average CV of CA 72-4 tests, whose number of participants was the smallest, was the lowest. The average CV of AFP tests, which included a sample with very high levels, was the highest.
Keywords : Proficiency testing, Tumor marker, Korean Association of External Quality Assessment Service
References
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