External auditory canal exostoses

Exostosis of the external auditory canal (also known as Surfer's ear), is an abnormal bone growth within the ear canal. It is brought about by exposure to cold wind and water combined, producing a super-cooling of the ear canal.

Radiographic features

  • broad based or more focal circumferential bony overgrowth of the osseous external auditory canal
  • bilateral

Differential diagnosis

External auditory canal osteoma: unilateral focal, pedunculated bony overgrowth.

See also

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Article Information

rID: 4054
System: Head & Neck
Tags: stub, refs
Synonyms or Alternate Spellings:
  • Surfer's ear
  • Exostosis of the ear canal
  • Exostosis of the external auditory canal (EAC)
  • EAC exostosis
  • EAC exostoses
  • External ear canal exostosis

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Cases and Figures

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