Journal
CLINICAL CASE REPORTS
Volume 8, Issue 9, Pages 1704-1707Publisher
WILEY
DOI: 10.1002/ccr3.2968
Keywords
heterophilic antibody; immunochromatography assay; procalcitonin; rheumatoid arthritis; rheumatoid factor
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We report three rheumatoid arthritis (RA) patients with false-positive procalcitonin (PCT) based on semiquantitative immunochromatography assays without infection, but who had negative PCT assay results based on quantitative methods. Immunochromatography was useful for screening; however, other heterophilic antibodies rather than rheumatoid factor were possible to affect, especially in RA flare.
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