Skin nonmelanocytic tumor
Adnexal tumors - hair follicles

Topic Completed: 1 June 2012

Revised: 4 April 2019

Copyright: 2002-2016,, Inc.

PubMed Search: Trichofolliculoma [title]

Christopher S. Hale, M.D.
Page views in 2018: 11,301
Page views in 2019 to date: 9,882
Cite this page: Hale C. Trichofolliculoma. website. Accessed October 14th, 2019.
Clinical images

Images hosted on other servers:


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

Images hosted on PathOut server:

Courtesy of Mark R. Wick, M.D.

Images hosted on other servers:

Various images

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