External ear tumors - benign / nonneoplastic
Keratinous cyst

Author: Nat Pernick, M.D. (see Authors page)

Revised: 23 February 2018, last major update October 2013

Copyright: (c) 2002-2018, PathologyOutlines.com, Inc.

PubMed Search: Keratinous cyst ear

Cite this page: Pernick, N. Keratinous cyst. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/earkeratinouscyst.html. Accessed July 22nd, 2018.
Definition / general
  • Common around external ear
  • Related to branchial cleft or epidermal inclusion cysts
  • Recurrence rate of 13% with punch incision technique (Dermatol Surg 2002;28:673)
Case reports
Microscopic (histologic) description
  • Lined by keratinized squamous epithelium, filled with keratin
Microscopic (histologic) images

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Epidermal inclusion cyst