Duplicated internal auditory canal with dysplastic ossicles and microtia: role of high-resolution CT and MRI

Singh, Priya; Israrahmed, Amrin; Akhter, Javed; Lal, Hira

doi:10.1136/bcr-2021-243825

Cited by 1 publication

(4 citation statements)

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“…The VIII nerve is either hypoplastic or aplastic. 10 Facial (VII) nerve is normal in most of the reported cases. 5 In our case, the patient was asymptomatic till 14 years of age when she had sudden onset of right facial palsy and gradual right-sided hearing loss from 17 years of age.…”

Section: Discussionmentioning

confidence: 88%

“…The VIII nerve is either hypoplastic or aplastic. 10 Facial (VII) nerve is normal in most of the reported cases. 5 …”

Section: Discussionmentioning

confidence: 88%

“…4 HRCT of temporal bone and MRI with multiplanar reconstruction and volume rendering must be done to identify IAC duplication. 10 High-resolution gradient echo MRI such as three-dimensional constructive interference in steady state best depicts the neural integrity. 5 The patient in this study had moderate degree of unilateral hearing loss, therefore, use of hearing aid would have benefited her.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Internal auditory canal duplication with facial and cochlear nerve dysfunction: A case report

Ghising,

Dongol,

Suwal

2023

SAGE Open Medical Case Reports

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Internal auditory canal duplication is a rare anomaly of the temporal bone. The condition is diagnosed on performing High-Resolution Computed Tomography of the temporal bone and magnetic resonance imaging for sensorineural hearing loss. A bony septum divides the internal auditory canal into dual compartments. Duplication may be either unilateral or bilateral and vestibulocochlear nerve may be aplastic or hypoplastic. Rarely, patient may present with facial nerve palsy. A 26-year-old female presented with right grade IV lower motor neuron facial nerve palsy for 12 years and right-sided hearing loss for 9 years. Pure tone audiogram revealed 45 dB of moderate degree sensorineural hearing loss on the right ear. On High-Resolution Computed Tomography of the temporal bone, an incomplete bony septum was visualized in the right internal auditory canal, dividing it into two compartments. Internal auditory canal on the left side was normal. Other inner and middle ear structures were normal. On magnetic resonance imaging, both the vestibulocochlear and facial nerves were well visualized with normal calibers.

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Section: Discussionmentioning

confidence: 88%

“…The VIII nerve is either hypoplastic or aplastic. 10 Facial (VII) nerve is normal in most of the reported cases. 5 …”

Section: Discussionmentioning

confidence: 88%