The Narrow Internal Auditory Canal with Triplication on the Left Side and with Duplication on the Right Side: Radiological Findings
Abstract
The constricted internal auditory canal with duplication or triplication of the temporal bone is a very rare anomaly with only 23 cases in 16 reports in the literature, and only one of them is a constricted triplicated internal auditory canal (IAC) in which contralateral IAC is normal. We present the case with the right-sided constricted duplicated IAC and the left-sided narrow triplicated internal auditory canal. Computerized tomography (CT) revealed that the internal auditory canals separated by a bony septum into two canals on the right lateral and into three canals on the left lateral. Manyetik resonance (MR) imaging showed bilateral aplasia of cohlear nerve.
Keywords
narrow duplicated, triplicated internal auditory canal, computed tomography, magnetic resonance imaging, congenital hearing loss
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