Koebner Phenomenon Developed on Skin Grafts and Flaps But Not on Graft Donor Site in a Psoriasis Patient

Abstract

The Koebner phenomenon describes the appearance of new isomorphic lesions on otherwise normal-looking skin in response to trauma. A 42-year-old male presented erythematous macules and patches with silvery scales on left leg, right knee, and surgical wounds including skin grafts, flaps, and donor sites for flaps, but not on the donor site for split thickness skin graft. He had received surgical treatment for electrical burns on both arms 4 months before the skin lesions developed. The mechanisms of the phenomenon is not clear yet. We present evidence that local factors may be important in the development of the Koebner phenomenon.