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 patient with history of chronic otomastoiditis.

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

  • ice cream cone in the epitympnaun: in the disease erosion of the cone (incus body/short process) may occur
  • 2 parallel lines in mesotympnaum: 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
Section: Pathology
Synonyms or Alternate Spellings:

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