Demographics:
5 years old, Female
Indication:
Left-sided conductive hearing loss with microtia
Case #1
Findings
- LEFT
- External ear:
- Mild microtia
- Atretic external auditory canal with a solid bony plate in the typical location of the external auditory canal measuring 5 mm in thickness
- Nonvisualization of the tympanic membrane
- Middle ear/mastoid:
- Mild asymmetric underpneumatization of the left mastoid temporal bone relative to the right
- Dysplastic handle of the malleus, which appears fixed to the anterior wall of the mesotympanum
- Normal appearance of the incus and stapes
- Normal volume and aeration of the middle ear
- Blunted appearance of the pyramidal eminence with a shallow facial recess
- Atypical splitting of the descending mastoid facial nerve canal with a larger channel exiting anteriorly
- Internal ear
- Normal appearance of the IAC, cochlea, and vestibular apparatus
- External ear:
- RIGHT
- Normal
Diagnosis
External auditory canal atresia
Key Imaging Features
Become a PRO member to unlock the key imaging features
Differential Diagnosis
Become a PRO member to unlock the differential diagnosis
Pearls
Become a PRO member to unlock the pearls
Discussion