How do exostoses and osteomas differ and when do they require surgical treatment?

Updated: Mar 09, 2020
  • Author: Ariel A Waitzman, MD, FRCSC; Chief Editor: Ravindhra G Elluru, MD, PhD  more...
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Exostoses and osteomas, the two most common bony lesions of the EAC, differ both histologically and clinically. Exostoses tend to arise from the anterior or posterior floor of the medial EAC (or from both simultaneously), have a sessile base, and are covered with normal-appearing skin. Osteomas may arise from any region of the bony EAC, are often pedunculated, may be single or multiple, and are covered by normal skin. Exostosis and osteomas require surgical treatment only if they are so large that they lead to a conductive hearing loss or intractable OE.

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