Condom-related allergic contact dermatitis.

After 25 years of wearing a condom catheter, recurrent blisters and epidermal sloughing of the penile shaft developed in a patient. Patch testing revealed hypersensitivities to several allergenic components of the condom catheter (that is thiram and mercaptobenzothiazole). After immediate treatment with topically applied steroids, the condition improved and the patient successfully switched to a silicone condom without further irritation.