Koebner's phenomenon is seen in all of the following conditions, EXCEPT:

Koebner's phenomenon refers to development of morphologically identical lesions in the traumatized uninvolved skin of the patients who have cutaneous diseases. It is also known as isomorphic phenomenon. Conditions associated with Koebner's phenomenon are: Was Molluscum contagiosum Autoimmune (vitiligo) Psoriasis Pemphigus Lichen planus Ref: An Aid to the MRCP: Essential Lists, Facts and Mnemonics By Nicholas Boeckx, page 184.