Chronic otomastoiditis with ossicular erosions
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Chronic otomastoiditis with ossicular erosions (aka) , also known asnon-cholesteatomatous ossicular erosion or post inflammatory-cholesteatomatous ossicular erosions 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.
Radiographic features
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
-
2two parallel lines in mesotympanum: erosive changes occur in the posterior line (incus lenticular process, incudostapedial joint and stapes head) - in coronal CT: erosions occur in the vertical segment of the right angle (long process of incus)
- tympanic
membranemembrane usually is thick and retracted
Differential diagnosis
- congenital
/ acquired/acquired cholesteatoma with ossicular erosions - post-operative ossicular loss (associated with mastoidectomy)
- post-traumatic ossicular dislocation
See also
-<p><strong>Chronic otomastoiditis with ossicular erosions</strong> (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.</p><h4>Radiographic features</h4><p>Normal anatomy of the ossicular chain should be checked to confirm the diagnosis.</p><ul>-<li>-<strong>ice cream cone</strong> in the epitympanum: in the disease erosion of the cone (incus body/short process) may occur</li>-<li>-<strong>2 parallel lines</strong> in mesotympanum: erosive changes occur in the posterior line (incus lenticular process, incudostapedial joint and stapes head)</li>-<li>in coronal CT: erosions occur in the vertical segment of the <strong>right angle </strong>(long process of incus) </li>-<li>tympanic membrane usually is thick and retracted</li>- +<p><strong>Chronic otomastoiditis with ossicular erosions</strong>, also known as<strong> </strong><strong>non</strong><strong>-</strong><strong>cholesteatomatous</strong><strong> ossicular erosions</strong> or <strong>post-inflammatory ossicular erosions</strong>, is defined by the erosive changes involving the <a title="Ossicles" href="/articles/ossicles">ossicles</a> in the absence of <a title="Cholesteatoma" href="/articles/cholesteatoma">cholesteatoma</a> in a patient with a history of <a title="Chronic otomastoiditis" href="/articles/chronic-otomastoiditis">chronic otomastoiditis</a>.</p><h4>Radiographic features</h4><p>Normal anatomy of the ossicular chain should be checked to confirm the diagnosis:</p><ul>
- +<li>ice cream cone in the epitympanum: in the disease erosion of the cone (incus body/short process) may occur</li>
- +<li>two parallel lines in mesotympanum: erosive changes occur in the posterior line (incus lenticular process, incudostapedial joint and stapes head)</li>
- +<li>in coronal CT: erosions occur in the vertical segment of the right angle (long process of incus) </li>
- +<li>tympanic membrane usually is thick and retracted</li>
-<li>congenital/ acquired <a href="/articles/cholesteatoma">cholesteatoma</a> with ossicular erosions</li>- +<li>congenital/acquired <a href="/articles/cholesteatoma">cholesteatoma</a> with ossicular erosions</li>
-</ul><h4>See also</h4><ul>-<li><a href="/articles/chronic-otomastoiditis">chronic otomastoiditis</a></li>-<li><a href="/articles/chronic-otomastoiditis-with-tympanosclerosis">Chronic otomastoiditis with tympanosclerosis</a></li>-</ul>- +</ul><h4>See also</h4><ul><li>
- +<a href="/articles/chronic-otomastoiditis">chronic otomastoiditis</a><ul><li><a href="/articles/chronic-otomastoiditis-with-tympanosclerosis">chronic otomastoiditis with tympanosclerosis</a></li></ul>
- +</li></ul>
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