Allergic contact dermatitis caused by panthenyl ethyl ether in a patient with psoriasis.

A 65-year-old woman with palmoplantar psoriasis was referred with intense itching eczematous dermatitis on her feet. Her history showed that she had her psoriasis treated for 3months with oral acitretin 0.5mg/kg daily and daily topical application of an emollient stick used to improve the re-epithelization of fissured heels. During the treatment, her hands healed quickly, but she experienced worsening of the skin lesions on the feet during the last month of therapy. Patch testing was performed with the baseline series of the Italian Society of Allergological, Occupational and Environmental Dermatology (SIDAPA) (Euromedical, Calolziocorte, LC, Italy), and with the