The Pathologic Features of Keratosis Obturans and Cholesteatoma of the External Auditory Canal

Jerry Naiberg, Gilead Berger, Michael Hawke*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The presence of a keratin plug occluding the deep external auditory canal was first noted and documented in the 19th century. It has subsequently been proposed that two different diseases can be responsible for the presence of this type of obstruction within the deep meatus: keratosis obturans and external auditory canal cholesteatoma. Keratosis obturans is characterized by a dense plug of keratin debris located primarily within the deep meatus. There is an associated hyperplasia of the underlying epithelium and evidence of chronic inflammation within the subepithelial tissue. There is no evidence of erosion or necrosis of the underlying bone. In external auditory canal cholesteatoma the significant finding is extensive erosion of the bony external auditory canal by a wide-mouthed sac, lined with stratified squamous keratinizing epithelium, that arises lateral to the tympanic membrane and is located in the inferior portion of the bony external canal. There is frequently evidence of sequestration of the underlying bone.

Original languageEnglish
Pages (from-to)690-693
Number of pages4
JournalArchives of Otolaryngology
Volume110
Issue number10
DOIs
StatePublished - Oct 1984
Externally publishedYes

Fingerprint

Dive into the research topics of 'The Pathologic Features of Keratosis Obturans and Cholesteatoma of the External Auditory Canal'. Together they form a unique fingerprint.

Cite this