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External auditory canal osteoma

Findings:
Bony density lesion attached to the posteroinferior wall of the right external auditory canal through a stalk measuring approximately 7 x 4 mm and mildly narrowing the canal. No soft tissue thickening.
The left external auditory canal is normal.
The middle ear, vestibular-cochlear apparatus and internal acoustic canal have a normal appearance. The vestibular aqueduct is normal size.
The tympanic membrane and ossicles are normal. The epitympanic recess, scutum, mastoid antrum and mastoid air cells are normal.
The course of the facial nerve is normal.
The carotid canal and jugular foramen are unremarkable.
The orbits and the visualised paranasal sinuses are clear.

Impression:
Features are in keeping with right-sided external auditory canal osteoma.

Updated on 15. November 2023

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About the author

Dr Sara Mohebbi is a Consultant Radiologist (Facharzt für Radiologie) with sub-specialty training in neuroradiology. She served as Chief Resident at University Hospital Freiburg and is a member of the European Society of Radiology (ESR). Her clinical focus includes demyelinating disease, neuro-oncology, and vascular neuroimaging. Dr Mohebbi is the Clinical Lead at Radiology Prime, where she provides independent second opinion reports on brain and spine MRI.