Ear
External ear tumors - benign / nonneoplastic
Keratinous cyst
Author: Nat Pernick, M.D.
Last author update: 1 October 2013
Last staff update: 14 December 2020
Copyright: 2002-2023, PathologyOutlines.com, Inc.
PubMed Search: Keratinous cyst ear
Cite this page: Pernick N. Keratinous cyst. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/earkeratinouscyst.html. Accessed June 3rd, 2023.
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
- 58 year old woman with pigmented epidermal cyst (J Dermatol 1997;24:475)
Microscopic (histologic) description
- Lined by keratinized squamous epithelium, filled with keratin
