title: Diagnosis of cerebellopontine angle tumors.
abstract: Between 1980 and 1990, 9,176 patients suffering from otoneurological disorders were investigated in our clinic. Sixty-six (0.72%) internal auditory canal or other cerebellopontine angle tumors (CPAT) were diagnosed. Brainstem auditory evoked potentials (BAEP), interaural time discrimination, and magnetic resonance imaging (MRI) revealed to be the most sensitive and efficient tests for the detection of CPAT. However, the investigation of otoneurological symptoms cannot be limited to BAEP and MRI on the a priori of a hypothetical CPAT. Electrophysiologic tests such as impedancemetry, and electronystagmographic testing are also needed to elucidate the many causes of otoneurological symptoms.
authors.affiliation: Department of Oto-Neuro-Ophthalmology, Cantonal University Hospital, Geneva, Switzerland.
authors.forename: J P
authors.initials: JP
authors.lastname: Guyot
authors.forename: R
authors.initials: R
authors.lastname: Häusler
authors.forename: A
authors.initials: A
authors.lastname: Reverdin
authors.forename: J
authors.initials: J
authors.lastname: Berney
authors.forename: P B
authors.initials: PB
authors.lastname: Montandon
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002150:Caloric Tests; D002528:Cerebellar Neoplasms / Q000175:diagnosis* / Q000473:pathology; D002530:Cerebellopontine Angle / Q000473:pathology; D004584:Electronystagmography; D016057:Evoked Potentials, Auditory, Brain Stem; D005260:Female; D006320:Hearing Tests; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed