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Allergic contact dermatitis from para‐tertiary‐butylphenol‐formaldehyde resin (PTBP‐F‐R) in Northern Ireland

Over the past 5 years, 2270 patients with suspected allergic contact dermatitis were patch tested in our clinic to the European standard series of allergens. 7 patients (0.3%) showed a positive reaction (≥+) to PTBP‐F‐R. In 3 (42.9%) of these patients, the allergen was traced to adhesives but no allergen source was determined in the remainder (57.1%). On the basis of these findings, it is questionable whether PTBP‐F‐R alone should routinely be included in the European standard series.