chronisch stenosierende Otitis externa
External and
middle ear diseases: radiological diagnosis based on clinical signs and symptoms. EAC medial canal fibrosis. a Coronal CT demonstrates soft tissue crescent abutting tympanic membrane (arrow)—classic CT findings. b On axial CT, soft tissue is visible, filling EAC and sparing middle ear cavity
Medial canal
fibrosis • Medial canal fibrosis - Ganzer Fall bei Radiopaedia
Medial canal
fibrosis • Bilateral medial canal fibrosis - Ganzer Fall bei Radiopaedia
Medial canal fibrosis is characterized by fibrous tissue formation in the medial part of the bony external auditory canal.
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
Siehe auch:
und weiter:
Assoziationen und Differentialdiagnosen zu chronisch stenosierende Otitis externa:
