title: Occupational immediate-type hypersensitivity to henna in a hairdresser.
abstract: A case of a hairdresser who developed an immediate-type hypersensitivity with urticaria, rhinitis, and bronchial asthma on exposure to henna is reported. Prick tests with henna 1% in aqua and in ethanol showed positive reactions. Both patch tests and prick tests performed with the dye in henna, lawsone, or 2-hydroxy-1, 4-naphtoquinone, which is supposed to be an allergen, had negative results. These results suggest that not only 2-hydroxy-1,4-naphtoquinone but also other still undetermined ingredients of the henna powder should be considered as possible allergen(s).
authors.affiliation: Department of Occupational Dermatology, Free University Academic Hospital, Amsterdam, The Netherlands.
authors.forename: I M
authors.initials: IM
authors.lastname: Majoie
authors.forename: D P
authors.initials: DP
authors.lastname: Bruynzeel
mesh_terms: D000328:Adult; D001505:Beauty Culture; D009783:Dermatitis, Occupational / Q000209:etiology* / Q000503:physiopathology; D005260:Female; D006203:Hair Preparations / Q000009:adverse effects; D006801:Humans; D006969:Hypersensitivity, Immediate / Q000139:chemically induced*; D009285:Naphthoquinones / Q000009:adverse effects*; D010328:Patch Tests
chemical_list: D006203:Hair Preparations; D009285:Naphthoquinones; C005090:lawsone