High resolution temporal bone CT scan and magnetic resonance (MR) imaging were important tools for diagnosis. MRI Internal Auditory Canal With and Without Contrast (Gadolinium) The MRI will be performed on one of our high-strength GE 1.5/3.0T MRI scanners which provide the optimal image quality for this particular type of exam. Congenital internal auditory canal stenosis can be an important cause of sensorineural hearing loss, facial nerve palsy, and vestibular dysfunction. Intra-operative picture showing left meatoplasty. HRCT temporal bone coronal section showing sift tissue mass in left EAC.

HRCT temporal bone showing normal middle ear cavity with ossicles. Two cases revealed bilateral internal auditory canal stenosis, and others were unilaterally involved cases. A rare syndromic genetic deafness characterized by congenital hearing loss, atresia or stenosis of the external auditory canal, dilated internal auditory. Clinical photograph of the left ear of child showing complete external auditory canal atresia. This review focuses on the often-neglected outer ear, specifically the external auditory meatus (EAM), or ear canal. The meaning of INTERNAL AUDITORY CANAL is a short auditory canal in the petrous portion of the temporal bone through which pass the facial and auditory. In all cases, the diameter of the internal auditory canal was less than 2 mm on high-resolution temporal bone computed tomography (CT) scan. The mammalian ear is made up of three parts (the outer, middle, and inner ear), which work together to transmit sound waves into neuronal signals perceived by our auditory cortex as sound. The neural integrity monitor (triggered EMG) demonstrated stimulation of CN VII at the level of 0.4 mA or greater as facial nerve anatomy was identified. It is directed anterolaterally and contains the. The intra-auditory canal was opened and CN VII was dissected completely off the tumor from both the brainstem and lateral approach. Hearing loss including deafness was found in five cases, vestibular function loss in four cases, and profound functional loss of facial nerve in two cases. The internal auditory canal (IAC) is situated at the posterior aspect of the petrous part of the temporal bone. Chief presenting symptoms were hearing loss, facial nerve palsy, dizziness, and tinnitus. A retrospective analysis including clinical manifestation and radiological findings was made for seven patients who were diagnosed with congenital internal auditory canal stenosis from 1996 to 2002. Congenital internal auditory canal stenosis is a rare cause of sensorineural hearing loss in children.

Intra auditory canal