External ear tumors - benign / nonneoplastic

Topic Completed: 1 October 2013

Revised: 07 January 2019

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

PubMed Search: Osteoma [title] ear pathology

Nat Pernick, M.D.
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Cite this page: Pernick N. Osteoma. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/earosteoma.html. Accessed August 8th, 2020.
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
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