caa a22 4500 475849159 CHVBK 20180406123923.0 cr unu---uuuuu 170329e20000501xx s 000 0 eng 10.1007/s004050050230 doi (NATIONALLICENCE)springer-10.1007/s004050050230 Audiovestibular findings and location of an acoustic neuroma [Elektronische Daten] [J. J. Haapaniemi, E. T. Laurikainen, R. Johansson, T. Rinne, M. Varpula] Forty-one patients with unilateral acoustic neuroma (AN) were diagnosed by magnetic resonance imaging (MRI) between 1992 and 1997. All cases were analyzed with respect to tumor location and the results of audiometric examinations, auditory brainstem response (ABR) testing, and electronystagmography (ENG). Tumor location was determined by MRI and cases were divided into intracanalicular and extracanalicular sites. Intracanalicular tumors were significantly smaller than the extracanalicular ones The pure-tone hearing thresholds were better in ears with intracanalicular lesions than in those with extracanalicular ones. Respectively, speech reception thresholds were 33 dB and 45 dB, and speech discrimination scores 79% and 65%. ABR was abnormal in 98% of ANs, but was insufficient for determining tumor location. The ENG pursuit test was more frequently normal and the caloric side difference was smaller in ears with intracanalicular than extracanalicular AN. These findings show that the results of pure-tone and speech audiometry and ENG are better in ears with intracanalicular AN, while ABR results are similar regardless of tumor location. Springer-Verlag Berlin Heidelberg, 2000 Key words Acoustic neuroma nationallicence Auditory brainstem ¶response nationallicence Electronystagmography nationallicence Topodiagnosis nationallicence Haapaniemi J. J. Department of Otolaryngology, University Central Hospital of Turku, Turku, Finland, FI aut Laurikainen E. T. Department of Otolaryngology, University Central Hospital of Turku, Turku, Finland, FI aut Johansson R. Department of Otolaryngology, University Central Hospital of Turku, Turku, Finland, FI aut Rinne T. Department of Otolaryngology, University Central Hospital of Turku, Turku, Finland, FI aut Varpula M. Department of Radiology, University Central Hospital of Turku, Turku, Finland, FI aut https://doi.org/10.1007/s004050050230 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s004050050230 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Haapaniemi J. J. Department of Otolaryngology, University Central Hospital of Turku, Turku, Finland, FI aut NATIONALLICENCE 700 1- Laurikainen E. T. Department of Otolaryngology, University Central Hospital of Turku, Turku, Finland, FI aut NATIONALLICENCE 700 1- Johansson R. Department of Otolaryngology, University Central Hospital of Turku, Turku, Finland, FI aut NATIONALLICENCE 700 1- Rinne T. Department of Otolaryngology, University Central Hospital of Turku, Turku, Finland, FI aut NATIONALLICENCE 700 1- Varpula M. Department of Radiology, University Central Hospital of Turku, Turku, Finland, FI aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer