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Traumatic external auditory canal atresia.

K X McKennan1, R A Chole

  • 1Sacramento Ear, Nose, and Throat Surgical and Medical Group, California.

The American Journal of Otology
|January 1, 1992
PubMed
Summary
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Gunshot injuries can cause severe ear canal damage, leading to delayed closure or atresia. These cases highlight how trauma-induced ear canal obstruction and cholesteatomas can be initially missed, even by specialists.

Area of Science:

  • Otolaryngology
  • Trauma Surgery
  • Plastic Reconstructive Surgery

Background:

  • Periauricular gunshot injuries can cause significant soft tissue damage.
  • Such injuries may lead to overlooked otologic abnormalities, including external auditory canal (EAC) stenosis or atresia.
  • Early recognition of EAC complications is crucial for timely intervention.

Observation:

  • Two cases of post-traumatic EAC atresia were initially misdiagnosed by non-otolaryngologists.
  • During reconstructive surgery, large canal cholesteatomas were discovered secondary to complete EAC obstruction from trauma.
  • These cholesteatomas arose from the chronic obstruction of the EAC.

Findings:

  • Traumatic EAC obstruction can lead to the development of acquired cholesteatomas.

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  • Delayed diagnosis of EAC atresia can complicate management and necessitate extensive reconstructive procedures.
  • The dramatic soft tissue effects of periauricular gunshots can obscure underlying otologic damage.

    • Implications:

    • Highlights the importance of thorough otologic evaluation in patients with periauricular trauma.
    • Underscores the potential for delayed complications such as cholesteatoma formation after EAC obstruction.
    • Emphasizes the need for increased awareness among non-specialists regarding potential ear canal injuries from ballistic trauma.