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Book

Trichofolliculoma

Ryan S. Geist  1 , Jonathan S. Crane  2
In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan.
.
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Book

Trichofolliculoma

Ryan S. Geist et al.
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Excerpt

Trichofolliculoma is a cutaneous adnexal tumor derived from the hair follicle. Trichofolliculomas, also known as folliculomas, are a category of benign hair follicle tumors that comprise a diverse group of uncommon neoplasms. The specific type and extent of hair follicle differentiation distinguish each neoplasm. Several examples of more widely documented benign hair follicle tumors include trichilemmoma, trichoadenoma, dila­ted pore of Winer, and trichoblastoma.

Trichofolliculomas are considered hamartomatous neoplasms rather than neoplasms of a malignant nature. Trichofolliculomas are generally characterized by well-differentiated cells without atypical features, which display abnormal tissue arrangement. More specifically, trichofolliculomas manifest as a cystic dilation of 1 or more infundibula, characterized by a centralized opening to the skin surface, through which 1 or more hair shafts pass.

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Conflict of interest statement

Disclosure: Ryan Geist declares no relevant financial relationships with ineligible companies.

Disclosure: Jonathan Crane declares no relevant financial relationships with ineligible companies.

References

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