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
Microscopic (histologic) description
- Mature bone with bone marrow and intraosseous fibrovascular tissue covered by keratinized squamous epithelium