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Updated: Jul 5, 2026

Optical Monitoring of Living Nerve Terminal Labeling in Hair Follicle Lanceolate Endings of the Ex Vivo Mouse Ear Skin
Published on: April 5, 2016
Koebner phenomenon of the ear canal skin
O Young1, M Murphy, J Fitzgibbon
1Department of Otolaryngology, South Infirmary/Victoria Hospital, Old Blackrock Road, Cork, Ireland. oyoung@rcsi.ie
Abstract:
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.
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