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Positive reactions to gold sodium thiosulfate in patch test panels (TRUE Test) in Japan: A multicentre study

2018; Wiley; Volume: 80; Issue: 2 Linguagem: Inglês

10.1111/cod.13105

1600-0536

Kayoko Suzuki, Akiko Yagami, Akiko Ito, Atsuko Kato, Hitoshi Miyazawa, Hiromi Kanto, Kayoko Matsunaga,

Occupational exposure and asthma

Background The proportion of positive test results with gold sodium thiosulfate included in a patch test panel (P‐GST) had been found to be greater than that with gold sodium thiosulfate 0.5% pet. by allergEAZE (A‐GST). Objectives To compare positive reactions to P‐GST and A‐GST, and to evaluate late reactions after the day (D) 7 reading. Methods A retrospective analysis was performed of 588 patients at participating departments (119 males; 469 females) who were patch tested with P‐GST and A‐GST in May 2015 to March 2016. Results Positive test reactions to P‐GST and A‐GST were observed in 15% and 6% of patients, respectively. Three patients reported a positive reaction occurring after the D7 reading. Conclusions Gold sodium thiosulfate often gives a positive reaction after 2 to 3 weeks, and, in such cases, the positive reaction may be sustained, so it is recommended to assess the reaction for up to 1 month after application.