The reverse Koebner response or the sparing phenomenon is the non-appearance or disappearance of the skin lesions in patients suffering from psoriasis following cutaneous injury. This paper reports a reverse Koebner phenomenon referring to the complete clearing of the psoriatic skin lesions from the leg of a 63-yearold man following conservative treatment of a tibial fracture.

Koebner phenomenon indicates the newly appearance of isomorphic lesions at the sites of mechanically stimulated or injured skin. This phenomenon can be seen in various inflammatory, auto-immune, viral, fibrotic, and even tumoral disorders. Also, rheumatic diseases such as lupus erythematosus, dermatomyositis, and rheumatoid arthritis (RA) often present with cutaneous manifestations with isomorp...