RT Journal Article
SR Electronic
T1 Computed tomography of the anteverted internal auditory canal.
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 513
OP 515
VO 4
IS 3
A1 A J Silver
A1 A F Jahn
A1 P Sane
A1 M E Mawad
A1 S R Ganti
A1 S K Hilal
YR 1983
UL http://www.ajnr.org/content/4/3/513.abstract
AB A symmetric variation in the course of the internal auditory canals, visualized best on axial computed tomographic views with thin sections, was observed in three of 75 patients examined mainly for hearing, vestibular, and facial nerve dysfunction. The incidence may be lower in an unselected population. In coronal section, with either pluridirectional or computed tomography, an anteverted internal auditory canal may mimic the normal configuration of "medial narrowing" because of the effect of partial sectioning of an angled cylinder with a thin beam. The pathologic significance of this finding is uncertain. In the three cases reported, it was associated with adult-onset uni- or bilateral hearing loss. Vestibular function may be compromised but may not be symptomatic. Facial nerve function was not impaired.