An intriguing occupational atypical dermatitis with respiratory symptoms.

Methylisothiazolinone (MI), alone or in association with methylchloroisothiazolinone (MCI), is widely used as a preservative in cosmetic and occupational products, and is currently inducing an outbreak of sensitization throughout Europe (1). In the 2000s, MI as stand-alone preservative was introduced in industrial water-based products. Since 2005, several cases of occupational dermatitis caused by MI and MCI/MI have been described, including airborne contact dermatitis among painters (2). Only rarely have related respiratory disorders been described (3). In this case, combined dermatological and respiratory problems were seen, mimicking atopic disease, following airborne occupational exposure to a facade render containing MI and MCI/MI.