Fifty-five consecutive cases of neoplastic involvement of the internal auditory meatus resulting in ipsilateral retrocochlear auditory dysfunction were reviewed. Introduction.

Diagnosis and management. Finally, a summary of pathologic conditions involving structures in the internal auditory canal is presented near the end of the book. CyberKnife stereotactic radiosurgery was undertaken with a single dose of 23Gy to the right internal auditory canal.. Most people with nasopharyngeal cancer (NPC) notice a lump or mass in the neck that leads them to see a doctor. 1983; 24 (4):225–228. The technique of surgery for removal of tumors, transection of the vestibular nerve, and repair of the facial nerve are covered in detail along with preoperative preparation and postoperative complications. Am J Otol.

Cancer of the external auditory canal is a rare tumour with an annual incidence of one per one million inhabitants. As the acoustic neuroma expands it fills the internal auditory meatus (opening of the internal auditory canal, thereby compressing the cochlear (hearing nerve) and facial (facial strength) nerves. 1989 Jul; 10 (4):297–300. METHODS: Twenty-seven ears in 21 patients with 16 confirmed schwannomas were studied with the 3D T2-weighted prototype segment-interleaved motion-compensated acquisition in steady state (SIMCAST) and the T1-weighted contrast-enhanced spoiled …

The posterior petrosal approach may be used to provide exposure of tumors deeper within the posterior fossa, lateral to the internal auditory meatus (IAM). Acoustic neuroma is quite rare and approximately affects 1 in 100,000 persons in the population. Acoustic neuromas (also known as vestibular schwannomas) are benign tumors that arise from Schwann cells and primarily originate within the vestibular portion of cranial nerve VIII.The tumor forms within the internal acoustic canal with variable extension into the cerebellopontine angle.Most tumors are unilateral. When this is associated with the facial (VIIth cranial nerve) and vestibulocochlear (VII th cranial nerve) nerve, then it may cause compression of these nerves and result in hearing problems, facial pain or spasm, tinnitus etc. Eleven percent were other tumors. Fifty-five consecutive cases of neoplastic involvement of the internal auditory meatus resulting in ipsilateral retrocochlear auditory dysfunction were reviewed. The external auditory meatus a.k.a. As the tumor grows and starts to impinge upon the nerves and vessels, however, the clinical findings begin to appear. Acquired stenoses of the meatus, such as osteomas, exostoses, and fibrous dysplasias, were more frequently reported. "Meningioma of the Internal Auditory Meatus in a Child 3 Years Old" published on Mar 1956 by Journal of Neurosurgery Publishing Group. It seems obvious at this point that tumors arising within the internal auditory canal, where the subarachnoid space is relatively small, become symptomatic much … Eleven percent were other tumors. Meningiomas are the second most common lesion encountered within the cerebello-pontine angle (CPA) and rarely project into or originate from the internal auditory meatus (IAM). Acoustic neuroma is usually the diagnosis made when a tumor is found in this location because of its higher frequency.

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