External ear tumors - benign / nonneoplastic

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: Osteoma [title] ear pathology

Cite this page: Pernick, N. Osteoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/earosteoma.html. Accessed April 24th, 2018.
Definition / general
  • True neoplasms capable of unlimited growth, in contrast to exostosis
  • Common in ancient populations in middle ear, particularly Bedouins (Acta Otolaryngol 2005;125:1164)
  • Asymptomatic solitary masses attached by narrow pedicle to tympanosquamous or tympanomastoid suture line
Case reports
Microscopic (histologic) description
  • Mature bone with bone marrow and intraosseous fibrovascular tissue covered by keratinized squamous epithelium