Abstract THERE is now convincing evidence that audiologic test results cannot, in themselves, provide an adequate basis for the diagnosis of eighth nerve tumors. However, there remains a persistent notion that positive results will not lead to an erroneous diagnosis. This is to say that positive audiologic results will not be obtained unless an acoustic tumor is, in fact, present. This report concerns a case of severely impaired auditory function which returned to normal upon removal of a ninth cranial neurinoma. The patient exhibited many of the audiologic features presumed to be characteristic of eighth cranial nerve tumors; therefore, the clinical observations in this case may be of value in clarifying the responsible pathological mechanism and in illustrating that, although positive auditory test results may strongly suggest a cerebellopontine tumor, they need not necessarily indicate a lesion of the eighth nerve. Report of a Case A 49-year-old white housewife was admitted References 1. Cushing, H.: Tumors of the Nervus Acousticus and Syndrome of the Cerebello-Pontine Angle , Philadelphia: W.B. Saunders Co., 1917. 2. Brown, H.A.; and Love, J.G.: Significance of Otologic Findings in Cerebello-Pontine Meningioma , Laryngoscope 66:1186-1201, 1956.Crossref 3. Lindsay, J.R.: The Significance of Positional Nystagmus in Otoneurological Diagnosis , Laryngoscope 55:527-551, 1945.Crossref 4. Bucy, P.C.; and Ismat, F.: Tumors of the Cerebello-Pontine Angle , Arch Otolaryng 73:29-36, 1960.Crossref 5. Güttich, A.: Über 12 Fälle von otochirurgischoperierten Kleinhirnbrückenwinketumoren sowie über die Wiederherstellung des Hörvermögens bei einem Fall von Acusticusneurinom . Arch Ohr Nas Kehlkopfheilk 144:244-253, 1938.Crossref 6. Baker, G.S.; and Christoferson, L.A.: Meningiomas of the Cerebello-Pontine Angle: Report of a Case , Mayo Clinic Proc 25:549-552, 1950. 7. Miles, L.L.; and Echols, D.H.: Pearly Tumor of the Cerebello-Pontine Angle , Larnygoscope 61:1123-1125, 1951.Crossref 8. Jerger, J.F.; and Bucy, P.C.: Audiological Findings in an Unusual Case of VIIIth Nerve Lesion , J Aud Res 1:25-35, 1960. 9. Bender, M.B.: Extinction and Precipitation of Cutaneous Sensations , Arch Neurol Psychiat 54:1-9, 1945.Crossref 10. Sprague, J.M.; Chambers, W.W.; and Stetlar, E.: Attentive, Affective, and Adaptive Behavior in the Cat , Science 133:165-173, 1961.Crossref 11. Galambos, R.: Neural Mechanisms of Audition , Physiol Rev 34:497-528, 1954.
Archives of Otolaryngology – American Medical Association
Published: Mar 1, 1968
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