Figure 2.

Temporal Bone Case 2: A) Low power image through the cochlea, vestibule and oval window. No otosclerosis is seen. There is evidence of a stapedectomy with complete removal of the stapes footplate. B) High power image of the boxed area in A, which includes the otic capsule at the anterior margin of the oval window and part of the fibrous seal across the oval window. The single arrow points to bony fragment embedded in the fibrous tissue sealing the oval window, which is likely a piece of the stapes crura. Although this fragment is basophilic with two small vascular spaces, these findings alone are not diagnostic of otosclerosis. The double arrows indicate the normal appearing fissula ante fenestram.