In this paper we report about a 51-year-old male presented with right-sided sensory-neural deafness and facial nerve palsy, accompanied by severe tinnitus and ipsilateral loss of vestibular function due to a cavernous hemangioma in the internal auditory canal. MRI with Gadolinium is the imaging method of choice and a high index of clinical suspicion is necessary for the diagnosis of these tumors. Due to their relative small size, the temporal bone CT-scan may show no evidence of pathological widening of the internal auditory canal or the typical intralesional calcifications at the time of presentation. Magnetic resonance imaging (MRI) of the internal auditory canal (IAC) is a non-invasive, painless diagnostic imaging procedure that uses using radio waves and a strong magnetic field to create detailed images of the bony canal that transmits nerves and blood vessels from the base of the brain to the inner ear. MRI provides excellent assessment of the IAC and the bony changes occurring in the canal walls, and it provides excellent demonstration of the content of the canal. Early recognition and surgical intervention in these benign tumors may improve the chance of preserving the functional integrity of the facial nerve and provides better results after nerve reconstruction. Magnetic resonance imaging (MRI) is presently the study of choice for assessment of the internal auditory canal (IAC). The presence of a small contrast-enhancing tumor in the internal auditory canal accompanied by severe sensorineural hearing loss and facial nerve palsy, should raise the suspicion of a hemangioma. Depending on location and the nerve of origin, these lesions can cause severe and progressive sensorineural hearing loss, tinnitus, facial nerve palsy, or vertigo even when they are relatively small. Rarity: IAC lipomas are very rare and are estimated to make up less than. A significant percentage of these scans will present unexpected, incidental findings, which could have important clinical significance. The exact number of examinations depends on the number of modules for which the unit is used. Background The evaluation of patients presenting with audiovestibular symptoms usually includes MRI of the internal auditory meatus, the cerebellopontine angle and the brain. These tumors originate from the capillary bed of the epineurium surrounding the nerve and can either compress or infiltrate the nerve. Clinical Image Testing: MRI (Revised 11-9-2022) Katie Albus Modified on: Fri, 13 Jan, 2023 at 3:45 PM Revision History Between four and six examinations per unit are required for accreditation. The internal acoustic canal (IAC), also known as the internal auditory canal or meatus (IAM), is a bony canal within the petrous portion of the temporal bone that transmits nerves and vessels from within the posterior cranial fossa to the auditory and vestibular apparatus. Users of RadReport are welcome to download the published templates and to create templates for their personal use. Hemangiomas rarely occur in the internal auditory canal. RadReport templates are intended to provide examples of best practices for diagnostic reporting.
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