References in periodicals archive ?
CPA: Cerebellopontine angle, CSF: Cerebrospinal fluid, IAC: Internal auditory canal, MRI: Magnetic resonance imaging, CT: Computed tomography, NECT: Non-enhanced computed tomography, CECT: Contrast enhanced computed tomography, CEMR: Contrast enhanced MRI, DWI: Diffusion weighted image, CISS: Constructive interference steady state, MRS: Magnetic resonance spectroscopy, Gd: Gadolinium contrast.
One of the most important findings of our study is that MRI scan allows full appreciation of the normal anatomy and anomalies of the vestibulocochlear nerves within the internal auditory canal in children with congenital sensorineural deafness.
For instance, lipomas of the internal auditory canal and first genu will appear hyperintense on T1-weighted imaging without additional gadolinium and can be reliably identified with T1-weighted imaging with fat saturation (Figure 12).
For this purpose, the internal auditory canal diameters (inlet, mid-canal, and outlet canal lengths) were evaluated in this study.
* CT or MRI evidence of unilateral internal auditory canal mass consistent with acoustic neuroma
Study of the human internal auditory canal in relation to age and sex.
At this point she was sent for a magnetic resonance imaging (MRI) scan of the brain and internal auditory canals. She was subsequently referred for neurosurgery consultation after the study revealed a 1.8 x 1.0 x 1.5 cm enhancing lesion in the left jugular fossa (Fig 1).
Subsequent axial CT images of the temporal bones showed the defects of the bony labyrinth in proband such as a symmetric bulbous dilatation of the internal auditory canals in both ears and partial separation of the cochlea with the fundus of internal auditory canals, which was consistent with DFNX3.
Contrast Enhanced CT (CECT) shows a well-defined cone-shaped homogenous contrast enhancing lesion (23mm x 22mm) in the right Cerebellopontine Angle (CPA) eccentrically located in the right Internal Auditory Canal (IAC) displacing adjacent cerebellar cortex posteromedially with compression effacement of 4th ventricle with widening of CPA suggested acoustic schwannoma (Fig.
T1 images with gadolinium also showed a 17 mm VS on the right temporal bone, which did not reach the fundus of the internal auditory canal (Figure 3a).
Erkmen, "Ganglioneuroma of the internal auditory canal presenting as a vestibular schwannoma," Skull Base Reports, vol.
Previous studies [sup][34],[35],[36] have proven that the RS approach has various advantages, such as the adequate control of bleeding, dissection of the entire tumor under direct view, easy identification of the facial and cochlear nerves at their root entry zone and the distal end in the internal auditory canal, and adequate exposure of the foramen of Luschka.
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