Trichilemmoma - DermAtlas - Dermatology Image Atlas

Contributor

Greg Hosler, MD, PhD

Diagnosis

trichilemmoma

Body Site

forehead

Age

56 years

Pigmentation

light

Organization

discrete warty

Color

pink

Morphology

papule

Pattern

solitary

Comments

This lesion on the face of a 56-year-old man is a typical example of a trichilemmoma. These lesions are almost exclusively found on the face. Multiple lesions can be seen in Cowden disease, but this was a solitary, likely idiopathic form. The characteristic changes include the clear cell change with overlying hyperkeratosis and a peripheral thick eosinophilic basement membrane. The differential diagnosis would include an inverted follicular keratosis or a type of pilar acanthoma.

Description

At higher power of the same lesion, at the deep margin, there is a brightly staining eosinophilic basement membrane along the periphery. The bland clear-cell nature of the cells is evident.

Image Added

1/20/2006 22:50:43

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Other Resources

PubMed Medline Plus Medscape

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