4.5 Article

Patch Testing to Carvone: North American Contact Dermatitis Group Experience, 2009 to 2018

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DERMATITIS
卷 33, 期 1, 页码 42-50

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MARY ANN LIEBERT, INC
DOI: 10.1097/DER.0000000000000741

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Carvone, a flavoring agent, can cause allergic contact dermatitis. This study analyzed patch test reactions to carvone in patients tested from 2009 to 2018. The results showed that the prevalence of carvone sensitivity was 0.78%. Most of the carvone-positive patients were female, older than 40 years, and/or had facial dermatitis. Personal care products were the main source of exposure. There were cross-reactions with other fragrance/flavor markers in a significant portion of carvone-positive patients.
Background/Objectives Carvone, a flavoring agent, may cause allergic contact dermatitis. This study summarizes patch test reactions to carvone in patients tested by the North American Contact Dermatitis Group, 2009 to 2018. Methods This was a retrospective analysis of patients positive to carvone (5% petrolatum). Demographics were compared with those of patients who were negative. Other analyses included reaction strength, clinical relevance, coreactivity with other fragrance/flavor allergens, and exposure sources. Results Of 24,124 patients tested to carvone, 188 (0.78%) were positive. As compared with carvone-negative patients, carvone-positive patients were significantly more likely older than 40 years (P = 0.0284). Women (76.1%) and/or facial involvement (33.0%) were common in the carvone-positive group but not statistically different from carvone-negative patients; 73.3% (n = 138) of the reactions were currently relevant. Relevant sources were personal care products (46.3%, n = 87) and food (14.3%, n = 27). Coreactivity with other fragrance/flavor markers was present in 60.6% of carvone-positive patients, most commonly fragrance mix I (34.6%), balsam of Peru (24.5%), and cinnamic aldehyde (15.4%). Conclusions Ten-year prevalence of carvone sensitivity was 0.78%. Most carvone-positive patients were female, were older than 40 years, and/or had facial dermatitis. Personal care products were the most common source. Two-fifths of carvone reactions would have been missed by relying on other fragrance/flavoring allergens.

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