Medial canal fibrosis is characterized by fibrous tissue formation in the medial part of the bony external auditory canal.
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Clinical presentation
Patients can present with conductive hearing loss, otorrhea and/or a history of chronic otitis.
Radiographic features
Early stage
- a thickened tympanic membrane with edematous and mildly thickened medial external auditory canal mucosa
Late stage
- crescentic area of soft tissue thickening overlying the lateral tympanic membrane surface and extending laterally in to fill the medial external auditory canal
- no bony erosive changes
Differential diagnosis
- external auditory canal debris/cerumen
- external auditory canal cholesteatoma
- keratosis obturans
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