Incudo-malleolar dislocation

Case contributed by Dr Azza Elgendy

Presentation

History of head trauma and vertigo.

Patient Data

Age: 12 years
Gender: Male
Modality: CT

Evidence of chronic incudo-malleolar subluxation. The long process of the incus is pointing in the fossa incudis, with consequent total incudostapedial dislocation. There is also normal loss of the ice cream cone appearance. 

Case Discussion

Ossicular chain disruption is not uncommon complication following trauma to the head and temporal bone. Meriot et al has identified five types of ossicular injuries following trauma 1

  • incudostapedial joint separation
  • incudomalleolar joint separation
  • dislocation of the incus
  • dislocation of the malleoincudal complex
  • stapediovestibular dislocation
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Case Information

rID: 29481
Case created: 29th May 2014
Last edited: 8th Sep 2015
System: Head & Neck
Tag: trauma
Inclusion in quiz mode: Included

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