[Circumscribed erythema after cardiac pacemaker implantation].

The pathological reactions of the tissue under the picture of a circumscriptive erythema above the pacemaker-pouch of a 35-year-old patient was noticed and documented for more than 10 years. Repeated appearance of a painful and fluctuating swelling above the silicone-containing implant, as well as non-symptomatic intervals during times without application of silicone-material led to the assumption of an allergic contact dermatitis to the silicone components of the pacemaker. However, patch-testing of the pacemaker's constituents remained negative and could not verify this supposition.