Chronic otomastoiditis with ossicular erosions

Chronic otomastoiditis with ossicular erosions (aka) non-cholesteatomatous ossicular erosion or post inflammatory ossicular erosions is defined by the erosive changes involving the ossicles in the absence of cholesteatoma in a patient with a history of chronic otomastoiditis.

Normal anatomy of the ossicular chain should be checked to confirm the diagnosis.

  • ice cream cone in the epitympanum: in the disease erosion of the cone (incus body/short process) may occur
  • 2 parallel lines in mesotympanum: erosive changes occur in the posterior line (incus lenticular process, incudostapedial joint & stapes head)
  • in coronal CT: erosions occur in the vertical segment of the right angle (long process of incus)  
  • tympanic  membrane usually is thick and retracted
  • congenital/ acquired cholesteatoma with ossicular erosions
  • post-operative ossicular loss (associated with mastoidectomy)
  • post-traumatic ossicular dislocation
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Article information

rID: 47519
System: Head & Neck
Synonyms or Alternate Spellings:

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