External auditory canal cholesteatoma

Case contributed by Ammar Haouimi
Diagnosis probable


Right ear fullness.

Patient Data

Age: 10 years
Gender: Female

There is a soft tissue mass filling the external auditory canal (EAC) with erosion of its posterior wall as well as erosion with partial destruction of the tympanic part of temporal bone. The tympanic membrane is intact with no extension to the middle ear.

Normal middle and inner ear structures.

Case Discussion

CT feature of a soft tissue mass of the EAC with bony erosion suggestive of cholesteatoma.

The main differential diagnosis is Keratosis obturans (but no bony erosion, as opposed to EAC cholesteatoma).


Additional contributor: C. Boukaaba, MD

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