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Evaluating the Role of Magnetic Resonance Imaging Scans in the Surgical Management of Acoustic Neuromas
Author(s) -
Hampton Susanne M.,
Adler Julian,
Atlas Marcus D.
Publication year - 2000
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1097/00005537-200007000-00024
Subject(s) - auditory canal , magnetic resonance imaging , neurotology , acoustic neuroma , medicine , neuroma , radiology , echo (communications protocol) , schwannoma , ear canal , audiology , surgery , computer science , endoscopy , endoscopic surgery , computer network
Objective To assess the reliability of magnetic resonance imaging (MRI) in predicting the size and position of an acoustic neuroma, with particular reference to the intracanalicular portion. Study Design Prospective study comparing the position of the tumor in the internal auditory canal on fast spin‐echo MRI with the actual position measured intraoperatively. Methods The study was performed in a tertiary referral neurotology center, encompassing both the public and private health care systems. Fifteen consecutive patients admitted for acoustic neuroma removal via the translabyrinthine approach were studied. The main outcome measure was tumor position in the internal auditory canal expressed in millimeters, accurate to the nearest 0.5 mm. Results The fast spin‐echo MRI was accurate within an error of 1 mm in predicting the lateral extent of the tumor in the internal auditory canal. Conclusion Fast spin‐echo MRI can accurately predict the lateral extent of an acoustic neuroma and allow accurate planning of the surgical approach.