Skin nonmelanocytic tumor
Adnexal tumors
Hair follicles

Topic Completed: 1 June 2012

Minor changes: 16 October 2020

Copyright: 2002-2021,, Inc.

PubMed Search: Trichofolliculoma [title]

Christopher S. Hale, M.D.
Page views in 2020: 10,283
Page views in 2021 to date: 4,169
Cite this page: Hale C. Trichofolliculoma. website. Accessed May 7th, 2021.
Clinical images

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Gross description
  • Solitary and nodular, may have multiple fine hairs protruding
Microscopic (histologic) description
  • 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
Microscopic (histologic) images

Contributed by Mark R. Wick, M.D.

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