isomorphic response

i·so·mor·phic re·sponse

a response to trauma at sites of injury in previously uninvolved areas of patients with skin diseases such as psoriasis and lichen planus, typically with linear lesions at sites of scratching or a scar. Synonym(s): Köbner phenomenon

Köbner,

H., German dermatologist, 1838-1904. Köbner phenomenon - an isomorphic reaction seen in response to trauma in previously uninvolved sites of patients with skin diseases. Synonym(s): isomorphic response