By Gary M. White, MD

cutaneous horn

A cutaneous horn is formed by a conical projection of keratin. At the base, one may find an actinic keratosis, keratoacanthoma, squamous cell carcinoma, verruca or seborrheic keratosis.


A conical hyperkeratotic projection rising up from the skin is seen. At the base, a more fleshy papulonodule is typical. Giant forms may occur [J Dermatol Case Rep. 2015;9:113].


Usually, a shave biopsy along with curettage and electrodessication of the base is in order to diagnose and treat an underlying actinic keratosis, KA or SCC is performed.

Additional Pictures

cutaneous horn cutaneous horn

cutaneous horn


Giant cutaneous horn on the forehead arising from an SCC. JAAD Case Reports September 2015 Volume 1, Issue 5, Pages 295–297

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