Fenesteral otosclerosis

Case contributed by A.Prof Frank Gaillard

Presentation

Left sided hearing loss.

Patient Data

Age: Adult

CT temporal bones

Modality: CT

CT trough the left temporal bone demonstrates a circumscribed region of demineralisation immediately anterior to the oval window, in the bone between the cochlea and vestibule.

Annotated

Modality: Diagram

The stapes' footplate fils the oval window. Immediately anterior to it is a region of lucency. 

Case Discussion

This is a characteristic appearance for fenestral otosclerosis. It is a subtle finding which is often bilateral. As such getting used to the normal appearance of this region is essential if the diagnosis is to be made. 

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Case Information

rID: 5580
Case created: 9th Feb 2009
Last edited: 10th Dec 2015
System: Head & Neck
Inclusion in quiz mode: Included

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