Trichofolliculoma

Trichofolliculoma is an uncommon benign dermatologic neoplasm.

General

• Benign.

Microscopic

Features:

• Irregular hair follicle (basilar nest of cells with an acellular hair shaft) with:
  • Smaller satellites (follicles) consisting of well-circumscribed basilar cells.

Note:

• Lack artificial clefting between the (basilar) nests and stroma (seen in BCC).
• Surrounding stroma does not have a basophilic tingle (seen in BCC).

DDx:

• Trichoblastoma.
• Basal cell carcinoma.
• Pilar sheath acanthoma.

Images

www:

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  Trichofolliculoma. (WC)

See also

• Dermatologic neoplasms.