Trichilemmal Horn: A Case Report

Corno Triquilemal - relato de caso

Keywords: Forehead, Keratosis


Trichilemmal horn or trichilemmal keratosis is a benign neoplasm, that occurs more frequently in females and in the age group over 50 years old. Clinically, it presents as a cutaneous horn and histologically shows trichilemmal keratinization at the base of the lesion.
As an uncommon pathology, in this case report, we will present the case of a young man (14 years old), presenting a keratotic lesion on the forehead for eight months, which revealed the diagnosis of trichilemmal horn after lesion exeresis and anatomopathological analysis.


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R. Haro, E. González-Guerra, M.C. Fariña, L. Martín-Moreno, L. Requena - Trichilemmal Horn: a New Case and Review of the Literature; Actas Dermo-Sifiliográficas (English Edition); Volume 100, Issue 1, 2009, Pages 65-68;

DiMaio DJ, Cohen PR. Trichilemmal horn: case presentation and literature review. J Am Acad Dermatol. 1998 Aug;39(2 Pt 2):368-71. doi: 10.1016/s0190-9622(98)70393-7. PMID: 9703156;

Lin, F. and C. Hsu. “Trichilemmal Keratosis Manifesting as a Cutaneous Horn.” (2009);

Peteiro MC, Toribio J, Caeiro JL. Trichilemmal horn. J Cutan Pathol. 1984 Aug;11(4):326-8. doi: 10.1111/j.1600-0560.1984.tb00386.x. PMID: 6208225;

Nakamura K. Two cases of trichilemmal-like horn. Arch Dermatol. 1984 Mar;120(3):386-7. PMID: 6231001.

How to Cite
C. Davanço, R., J. Neto, D., B. Milanez, C., & J. Tebcheran, A. (2021). Trichilemmal Horn: A Case Report. Journal of the Portuguese Society of Dermatology and Venereology, 79(4), 365-367.
Case Reports