Allergic contact dermatitis in a girl due to several cosmetics containing diazolidinyl-urea or imidazolidinyl-urea.

摘要

Preservatives are among the most frequent causes of allergic contact dermatitis caused by cosmetics. Such products are needed to prevent mic-robial contamination, which may cause discoloration, malodours, and physical and chemical degradation (1). Formaldehyde-releasing preservatives are a group of substances that release formaldehyde as a result of decomposition (2). Diazolidinyl-urea, imidazol-idinyl-urea, quaternium-15, DMDM hydantoin, and 2-bromo-2-nitropro-pane-l,3-diol are well-known examples frequently used in cosmetics. We present the case of a girl reacting to several products containing diazolidinyl-urea and/or imidazolidiny-urea. Patch test results to formaldehyde and other formaldehyde releasers were negative.