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June 1966

Remarks on Audiologic Diagnosis of Acoustic Neuromas

Author Affiliations

From the University of Chicago.

Arch Otolaryngol. 1966;83(6):590. doi:10.1001/archotol.1966.00760020592018

MY PRESENTATION is limited to the case histories of four patients with surgically confirmed eighth nerve neuroma seen consecutively during a three- or four-month period at the University of Chicago in 1965.

Report of Cases  Case 1.—A 40-year-old man had complained of hearing difficulty for four years; he had not suffered any vertigo. Hearing test results indicated the presence of a moderate degree of unilateral sensorineural deafness. The Bekesy audiogram was type II, the Fowler test indicated the presence of recruitment at 500 cps, and speech discrimination was 62%. The tone decay and the SI SI tests suggested the presence of an end organ rather than a nerve trunk lesion. Skull x-rays showed no abnormality, but the cerebrospinal fluid protein was 200 mg/100 cc. Following this abnormal finding laminograms and iophendylate (Pantopaque) cisternograms were carried out; these showed the presence of a tumor in the internal meatus extending into the

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