Koebner phenomenon (KP) is a well-known entity in dermatology. It was first described in 1876 by Heinrich Koebner, a German dermatologist, as “the development of lesions at sites of specifically traumatized uninvolved skin of patients with cutaneous diseases”. Since then, this isomorphic response has been reported in a several skin diseases, such as vitiligo, lichen planus, and psoriasis. In vitiligo a relation with disease activity has been suggested, as well as its possible negative influence on surgical treament results [1, 2].
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