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Caudal Dysplasia Sequence
Joseph Junewick, MD FACR
over 9 years ago
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Internal Auditory Canal Stenosis

Case Detail

Anatomy: Brain-Spine
Joseph Junewick, MD FACR
Diagnostic Category: Developmental or Congenital
Created: over 8 years ago
Updated: over 7 years ago
Tags: PEDS
Modality/Study Types: CT
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1 year old male with neurosensory hearing loss.

Case Images


Internal Auditory Canal Stenosis


CT – Axial image shows bilateral internal auditory canal stenosis, measuring <2 mm in diameter.


Internal auditory canal stenosis is associated with neurosensory hearing loss and failed cochlear stimulation implant because of cochlear nerve absence or hypoplasia; cochlear nerve abnormalities are present in 56% of patients with internal auditory canal stenosis. When this finding is encountered, high resolution MR imaging of the temporal bones is necessary.


Adunka OF, Roush PA, Teagle HFB, et al. Internal auditory canal morphology in children with cochlear nerve deficiency. Otol Neurotology (2006), 27(6):

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