External auditory canal exostoses - surfer's ear

Case contributed by Fabien Ho
Diagnosis certain


Symptoms of chronic right otitis media. Patient is a regular diver.

Patient Data

Age: 50 years
Gender: Male

Bilateral external auditory canal lesions consisting of cortical bone and periosteum, located deeply within the external auditory canal (not at the cartilage-bone junction), and causing circumferential stenosis. 

Case Discussion

The patient is a regular diver: both CT and clinical history are consistent with EAC exostosis.
There are signs of non-cholestatomatous chronic otitis media on the right.

Possible differential from otoscopy's point of view: EAC osteoma, which is usually unilateral, located at the bony-cartilaginous junction, and has a round shape.

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.