Allergic contact dermatitis on the hands from chloromethylisothiazolinone in moist toilet paper.

This article presents a case of allergic contact dermatitis on the hands from chloromethylisothiazolinone in moist toilet paper. A 28-year old married woman had developed fissured lesions on her hands which became more severe with the development of erythematous, pruriginous, vesicular lesions. She reportedly used moist toilet paper for her baby's hygiene. She was patch tested with a standard series, which was positive to Kathon CG (5-chloro-2-methyl-4-isothiazolin-3-one). A patch test with the moist toilet paper was also positive. Out of 19 brands of moist toilet paper whose information was collected from Spain, eight did not contain Kathon CG. The case is therefore concerned with a patient using moist toilet paper not of her own hygiene but for that of her baby, resulting in allergic contact dermatitis on the hands, a hitherto unreported localization.