External ear tumors - benign / nonneoplastic
Keratinous cyst

Topic Completed: 1 October 2013

Revised: 26 August 2019

Revised: 07 January 2019

Copyright: (c) 2002-2019, PathologyOutlines.com, Inc.

PubMed Search: Keratinous cyst ear

Nat Pernick, M.D.
Page views in 2018: 1,134
Page views in 2019 to date: 1,790
Cite this page: Pernick N. Keratinous cyst. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/earkeratinouscyst.html. Accessed October 19th, 2019.
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
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