The Koebner phenomenon originally described the appearance of psoriatic lesions 
in the uninvolved skin of patients with psoriasis as a consequence of trauma. We 
describe a case of concurrent lichen planus and sarcoidosis in the auditory 
canal, which represents an unusual manifestation of the Koebner phenomenon. This 
is the first case of concurrent lichen planus and sarcoidosis in the head and 
neck region and highlights the need for biopsy to allow accurate 
histopathological diagnosis and treatment.