Skin - Nonmelanocytic tumors
Adnexal tumors - hair follicles
Inverted follicular keratosis

Author: Christopher Hale, M.D. (see Authors page)

Revised: 6 October 2016, last major update June 2012

Copyright: (c) 2002-2016, PathologyOutlines.com, Inc.

PubMed Search: Inverted follicular keratosis [title]

Cite this page: Inverted follicular keratosis. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/skintumornonmelanocyticinvertedfollicularkeratosis.html. Accessed December 10th, 2016.
Definition / General
  • Eyelid or face of elderly
  • Etiology disputed: may be irritated seborrheic keratosis, irritated verruca vulgaris or keratotic lesion of infundibular region of hair follicle
Case Reports
Gross Description
  • Single nodule or papule projecting above skin surface
Micro Description
  • Well circumscribed with squamous eddies containing an inverted papillomatous and acanthotic component
  • No inflammation
Micro Images

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Various images

Differential Diagnosis