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External auditory exostoses: evaluation and treatment.

John W House1, Eric P Wilkinson

  • 1House Clinic, Los Angeles, CA 90057, USA.

Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
|April 29, 2008
PubMed
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External auditory exostosis (EAE) severity is similar in both ears for surgical patients. Postauricular canalplasty for EAE shows minimal complications, with rare prolonged healing or tympanic membrane perforation.

Area of Science:

  • Otolaryngology
  • Neurosurgery
  • Surgical Outcomes

Background:

  • External auditory exostosis (EAE) is a common condition requiring surgical intervention.
  • Understanding EAE severity distribution and surgical complication rates is crucial for patient management.

Purpose of the Study:

  • To compare the severity of EAE between the right and left ears in a surgical cohort.
  • To determine the incidence of complications associated with postauricular canalplasty for EAE.

Main Methods:

  • Retrospective review of 327 patients (401 ears) who underwent drill canalplasty for EAE between 1990 and 2006.
  • Grading of EAE severity and evaluation of hearing changes using air and bone conduction thresholds.

Main Results:

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  • No significant differences in EAE surgery rate or severity were observed between right and left ears; 95% of operated ears had grade 3 EAE.
  • Complications included prolonged healing (4.5%) and one tympanic membrane perforation (0.2%).
  • A slight worsening in sensorineural hearing at 4 kHz occurred (mean change 3.7 dB), but overall sensorineural bone conduction remained unchanged. EAE recurrence was noted in 8 of 91 ears with long-term follow-up.

Conclusions:

  • EAE severity does not differ significantly between ears in patients undergoing surgery.
  • Postauricular drill canalplasty is an effective surgical approach for EAE with a low complication rate.