Skin - Nonmelanocytic tumors
Benign nonmelanotic epidermal tumors / tumor-like lesions
Reviewer: Christopher Hale, M.D. (see Reviewers page)
Revised: 25 June 2012, last major update June 2012
Copyright: (c) 2001-2012, PathologyOutlines.com, Inc.
● Also called cornu cutaneum
● Descriptive term for horn-like hyperkeratotic lesion
● Usually caused by actinic keratosis, squamous cell carcinoma, keratoacanthoma, verruca, seborrheic keratosis, inverted follicular keratosis
● 84 year old woman with cutaneous horn of dorsal hand
(N Engl J Med 2008;359:10)
Large cutaneous horn associated with squamous cell carcinoma
● Protruding skin lesion composed of compact keratin resembling a horn
● Usually epidermal type keratin (with granular layer)
● Occasionally has trichilemmoma-like features (no granular layer but deep red granules)
End of Skin - Nonmelanocytic tumors > Benign nonmelanotic epidermal tumors / tumor-like lesions > Cutaneous horn
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