Figure 1
On this axial CT image of a temporal bone at the level of the oval window opacification of the tympanic cavity is seen, with complete erosion of the stapes and incus long process. The malleus neck is intact (white arrow): cholesteatoma with ossicular chain erosion.
Figure 2
On this axial CT image of a temporal bone at the level of the oval window, the otic capsule appears hypodense in the region of the fissula antefenestram (white arrow): fenestral otosclerosis.