Extracanalicular osteoma of the temporal bone

Case contributed by Dr Prashant Mudgal


Adult female presented with a growth in the right external auditory meatus and partial conductive hearing loss.

Patient Data

Age: 25 years old
Gender: Female

A single pedunculated bony growth arises from the posterior wall of the right external auditory meatus at the tympano-mastoid suture line causing narrowing of the external auditory canal. Imaging features are suggestive of extracanalicular osteoma.

Annotated image

Osteoma is shown in red color, its pedunculated and obstructing the EAM.

Case Discussion

Extracanalicular osteomas of the temporal bone are rare, slow-growing, benign neoplasms. Although they may occur anywhere in the temporal bone, they are most common in the mastoid area. Often, symptoms are negligible and treatment is unnecessary. However, surgical removal is indicated when growth of the osteoma causes distressing symptoms or cosmetic issues.

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Case information

rID: 27047
Published: 18th Jan 2014
Last edited: 12th Mar 2016
System: Head & Neck
Inclusion in quiz mode: Included

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