External auditory canal exostoses - surfer's ear
Symptoms of chronic right otitis media. Patient is a regular diver.
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Bilateral EAC lesions consisting of cortical bone and periosteum, located deeply within EAC (not at the cartilage-bone junction), and causing circumferential stenosis.
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.