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Heterotopic ossification in chronic fibrosing otitis externa
Elizabeth F Maughan1, Mahmood F Bhutta2, Jeremy Lavy2
1Royal National Throat, Nose and Ear Hospital, University College London Hospitals NHS Foundation Trust, London, UK lizzie@maughans.net.
Journal of Surgical Case Reports
|October 3, 2015
Summary
This study reports the first case of bone formation in chronic external auditory canal otitis. Surgeons should be aware of this rare finding to avoid surgical complications.
Area of Science:
- Otolaryngology
- Surgical Pathology
Background:
- Acquired external auditory canal atresia is a rare complication of chronic otitis, typically fibrous or soft tissue.
- Chronic fibrosing otitis externa can lead to significant auditory canal stenosis.
Observation:
- A 25-year-old male with a history of granular myringitis and tympanoplasty failure presented with acquired external auditory canal atresia.
- CT imaging revealed a calcified mass near the tympanic membrane.
Findings:
- Surgical exploration confirmed heterotopic ossification, presenting as a cohesive bone bar in the medial external auditory canal.
- Drill canaloplasty and skin grafting improved pure tone average from 79 dB to 55 dB.
Implications:
- This is the first reported case of heterotopic ossification in chronic fibrosing otitis externa.
- Awareness of cohesive bone formation is crucial for surgeons to prevent navigational errors during canaloplasty for stenosis.
- This condition may cause confusion and lead to over- or under-drilling during surgical intervention.
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