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Case Reports
. 2023 Feb 1;45(2):142-144.
doi: 10.1097/DAD.0000000000002333. Epub 2022 Dec 7.

Trichoepithelioma on the Finger: A Rare Location and Dermoscopic-Histopathologic Correlation

Fátima Mayo-Martínez  1 , Ruggero Moro  2 , Victor Traves  3 , Beatriz Llombart  1 , Celia Requena  1
Affiliations
Case Reports

Trichoepithelioma on the Finger: A Rare Location and Dermoscopic-Histopathologic Correlation

Fátima Mayo-Martínez et al. Am J Dermatopathol. .

Abstract

Trichoepithelioma is a benign adnexal neoplasm of follicular germinative cells, with bulbs, papillae, and sheaths of perifollicular connective tissue as signs of follicular differentiation. Accordingly, trichoepithelioma may arise in any hair-bearing location, mostly on the face. That is why trichoepithelioma cannot appear in glabrous skin, and, although the dorsum of the hands and feet are a hair-bearing area, acral location is exceptional. We report the first case of trichoepithelioma localized in the finger of a 79-year-old man. It was a brown-pink, firm, 7-mm diameter, solid papule on the dorsal aspect of his left index finger. The lesion was completely asymptomatic, and he remembered to have it for many years. We describe this case highlighting its rare anatomical location and correlate its dermoscopic features with the histopathological appearance.

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Conflict of interest statement

The authors declare no conflicts of interest.

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