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Current concepts in neuroradiological diagnosis of acoustic neuromas
Author(s) -
Mikhael Michael A.,
Wolff Allan P.,
Ciric Ivan S.
Publication year - 1987
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 - 10.1288/00005537-198704000-00012
Subject(s) - medicine , cerebellopontine angle , radiology , magnetic resonance imaging , auditory canal , radiological weapon , surgery
Two hundred twenty‐one cases with clinical suspicion of a cerebellopontine angle (CPA) and/or internal auditory canal (IAC) lesions were evaluated in our hospital in the last 2 1/2 years by various radiological modalities. Fifty‐two tumors were diagnosed and surgically removed; 48 were acoustic neuromas (33 large tumors and 15 intracanalicular small tumors) and 4 meningiomas. Polytomography detected 10 lesions out of 15 (66.7%) with 5 false‐negative (33.3%) and 4 false‐positive (26.7%) studies. Routine CT scan visualized large and enhancing lesions (37 out of 52), but missed the small intracanalicular tumors (15 tumors) which were only visualized by CT scan combined with cisternography or magnetic resonance imaging (MRI). MRI diagnosed 23 lesions out of 23 (100%) with no false‐positive or negative studies, including 8 intracanalicular small tumors missed on the routine CT scans. MRI is far more reliable in the radiological diagnosis of CPA and IAC lesions.