Preservation of labyrinthine structures while drilling the posterior wall of the internal auditory canal
in surgery of vestibular schwannomas via the retrosigmoid suboccipital approach.
of cases Percentage (%) Hypodense 29 69 Isodense 2 4.7 Hyperdense 2 4.7 Mixed 9 21.4 Expansion of the Internal Auditory Canal
in Cases of Acoustic Schwannoma
In 24 of 313 (7.6%) inner ear malformations internal auditory canal
was found to be malformed.
MRI can be used to image the facial nerve from the brainstem to the fundus of the internal auditory canal
and to determine the presence of perineural spread from parotid malignancies (Figure 9).
Vestibulocochlear nerve and the facial nerve enter the temporal bone through the internal auditory canal
. The width of the internal acoustic canal varies from person to person.
* CT or MRI evidence of bilateral internal auditory canal
masses consistent with acoustic neuromas
The remaining material is organized by anatomy, with seven chapters focusing on the external auditory canal and pinna; the middle ear and mastoid; temporal bone vascular anatomy, anomalies, and disease, with an emphasis on pulsatile tinnitus; the inner ear and otodystrophics; temporal bone trauma; anatomy and development of the facial nerve; and the vestibulocochlear nerve, with an emphasis on the normal and diseased internal auditory canal
and cerebellopontine angle.
Postnatal development of the vestibular aqueduct in relation to the internal auditory canal
. Computer-aided three-dimensional reconstruction and measurement study.
There are several classification systems for glomus tumors, such as the modified Jackson classification table (Greenberg, 2001), which grade the lesion based upon extension into the internal auditory canal
or petrous apex.
The clinical features of CT images of the temporal bones are now well recognized through reported cases.[sup],,, Besides the characteristics of CT images, audiological phenotype of DFNX3 is defined as profound deafness with or without a conductive element.[sup],,, The conductive component in the audiogram could also be concerned about because of an atypical communication between an internal auditory canal
and the inner ear leading to a pathologic third window which deteriorates air-conducted thresholds and increases bone-conducted thresholds.
Acoustic Schwannomas are benign tumours that arises from the nerve sheath of eight cranial nerve usually from vestibular division  and located within the internal auditory canal
(IAC) and cerebellopontine angle (CPA).
During one of these surgeries, the facial nerve was injured at the internal auditory canal
, resulting in right-sided facial paralysis.