The Variation of the Normal Internal Auditory Canal
نویسندگان
چکیده
منابع مشابه
MR of the normal and abnormal internal auditory canal.
MR performed with thin, contiguous sections has replaced CT for the study of the cerebellopontine angle and for diagnosis of acoustic neuromas. In our experience large acoustic neuromas are well seen in all pulse sequences. Tumors with small extracanalicular components are seen in the T1- and spin-density-weighted sequences whereas purely intracanalicular lesions are often visualized only in th...
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cavernous hemangioma is a rare benign tumor of the internal auditory canal (iac) of which fourteen cases have been reported so far. tinnitus and progressive sensorineural hearing loss (snhl) are the chief complaints of the patients. audiological and radiological planes, ctscan, and magnetic resonance image (mri) studies are helpful in diagnosis. the only choice of treatment is surgery with elec...
متن کاملDumbbell schwannomas of the internal auditory canal.
BACKGROUND AND PURPOSE Benign tumors of the internal auditory canal (IAC) may leave the confines of the IAC fundus and extend into inner ear structures, forming a dumbbell-shaped lesion. It is important to differentiate dumbbell lesions, which include facial and vestibulocochlear schwannomas, from simple intracanalicular schwannomas, as surgical techniques and prognostic implications are affect...
متن کاملDuplication anomaly of the internal auditory canal.
A 45-year-old man presented with slowly progressive left-sided hearing loss of 5 years duration. Examination revealed bilateral sensorineural hearing loss, more severe on the left, with poor speech discrimination on the left. Brainstem-evoked-response audiometry demonstrated borderline prolongation of interpeak latencies and poor early wave identification on the left side. A retrocochlear lesio...
متن کاملLipochoristoma of the internal auditory canal.
PROBLEM Approximately 90% of tumours of cerebellopontine angle and internal auditory canal are vestibular schwannomas (acoustic neuromas) and meningiomas. Lipochoristomas are rare benign masses that represent only 0.15% of cases. METHODOLOGY We report the case of a 39-year-old man who consulted us for right-sided hearing loss and tinnitus. RESULTS Tonal audiometry showed a down-sloping righ...
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ژورنال
عنوان ژورنال: Practica Oto-Rhino-Laryngologica
سال: 1974
ISSN: 1884-4545,0032-6313
DOI: 10.5631/jibirin.67.697