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
- 1. Harnsberger HR, MBBS CMG, Michel MA et-al. Diagnostic Imaging Head and Neck. Lippincott Williams & Wilkins. ISBN:1931884781. Read it at Google Books - Find it at Amazon
- 2. Kadam PD, Chuan HH. Erratum to: Rectocutaneous fistula with transmigration of the suture: a rare delayed complication of vault fixation with the sacrospinous ligament. Int Urogynecol J. 2016;27 (3): 505. doi:10.1007/174_2012_788 - Pubmed citation