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Skin - Nonmelanocytic tumors

Adnexal tumors-hair follicles

Trichofolliculoma


Reviewer: Christopher Hale, M.D. (see Reviewers page)
Revised: 5 July 2012, last major update June 2012
Copyright: (c) 2001-2012, PathologyOutlines.com, Inc.

Clinical images
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Trichofolliculoma

Gross description
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● Solitary and nodular, may have multiple fine hairs protruding

Micro description
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● Highly organoid hamartomatous lesions that recapitulate various phases of normal hair follicle
● Have central dilated follicle surrounded by proliferating epithelium with various phases of follicle formation
● Often Merkel cells present

Micro images
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Various images

Differential diagnosis
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● Dilated pore of Winer
● Folliculosebaceous hamartoma
● Pilar sheath acanthoma
● Nevus comedonicus

End of Skin - Nonmelanocytic tumors > Adnexal tumors-hair follicles > Trichofolliculoma


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