Contact allergy to methylisothiazolinone in a deodorant.

A 37-year-old atopic woman presented with a 1-week history of eczematous lesions affecting both axillae. She had been using a new deodorant, Mineral® (Garnier, L’Oréal, Portugal), for the previous 2 weeks. There was a past history of jewellery intolerance, and she did not report any previous skin reactions to perfumes and deodorants. She was treated with topical corticosteroids, and there was complete remission of the lesions in a few days. Patch testing was performed with Finn Chambers® and according to the International Contact Dermatitis Research Group criteria, with the Portuguese baseline series, a fragrance series, and her own product. The patient reacted to nickel (++), MCI/MI 100 ppm (++),