Abstract
The MR appearance of 15 tumors within or near the internal auditory canal was analyzed in detail and compared with the subsequent surgical observations. In most cases, nonenhanced MR showed the precise extent of the intracanalicular and extracanalicular tumor despite minor variations in appearance. In a case of facial nerve neurinoma, the extent to which the tumor invaded the canal was underestimated by MR. Gadolinium-DTPA enhancement is expected to eliminate uncertainties in MR imaging of the internal auditory canal.
MeSH terms
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Cerebellar Neoplasms / pathology
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Cerebellopontine Angle / pathology
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Cranial Nerve Neoplasms / diagnosis
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Ear Canal / pathology
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Ear Neoplasms / diagnosis*
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Ear Neoplasms / surgery
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Ear, Inner / pathology*
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Ear, Inner / surgery
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Facial Nerve / pathology
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Gadolinium
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Gadolinium DTPA
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Humans
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Magnetic Resonance Spectroscopy*
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Meningioma / diagnosis
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Neoplasm Invasiveness
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Neurilemmoma / diagnosis
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Neurofibroma / diagnosis
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Neuroma, Acoustic / diagnosis
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Organometallic Compounds
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Pentetic Acid
Substances
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Organometallic Compounds
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Pentetic Acid
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Gadolinium
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Gadolinium DTPA