S Gimsing1. 1. Department of Audiology, Vejle Hospital, Denmark. juul_gimsing@dadlnet.dk
Abstract
OBJECTIVES: (1) To compare audiometric parameters in patients with vestibular schwannoma and in those with asymmetric hearing loss from other causes; and (2) to assess proposed screening criteria by comparing published protocols. METHODS: Audiometric data from 199 vestibular schwannoma patients and 225 non-tumour patients were compared. Eight screening protocols were tested on these 424 patients. RESULTS: Vestibular schwannoma and non-tumour patients with little or no hearing loss in the unaffected ear were inseparable; however, vestibular schwannoma patients with hearing loss in the unaffected ear had greater audiometric asymmetry, compared with non-tumour patients with the same pattern of hearing loss. The sensitivity of screening protocols varied from 73 to 100 per cent; parallelism was observed between sensitivity and screening rate. CONCLUSION: As regards vestibular schwannoma screening protocols, the best compromise between sensitivity and screening rate was offered by a criterion comprising either: (1) > or =20 dB asymmetry at two neighbouring frequencies, or unilateral tinnitus, or (2) > or =15 dB asymmetry at two frequencies between 2 and 8 kHz.
OBJECTIVES: (1) To compare audiometric parameters in patients with vestibular schwannoma and in those with asymmetric hearing loss from other causes; and (2) to assess proposed screening criteria by comparing published protocols. METHODS: Audiometric data from 199 vestibular schwannomapatients and 225 non-tumourpatients were compared. Eight screening protocols were tested on these 424 patients. RESULTS:Vestibular schwannoma and non-tumourpatients with little or no hearing loss in the unaffected ear were inseparable; however, vestibular schwannomapatients with hearing loss in the unaffected ear had greater audiometric asymmetry, compared with non-tumourpatients with the same pattern of hearing loss. The sensitivity of screening protocols varied from 73 to 100 per cent; parallelism was observed between sensitivity and screening rate. CONCLUSION: As regards vestibular schwannoma screening protocols, the best compromise between sensitivity and screening rate was offered by a criterion comprising either: (1) > or =20 dB asymmetry at two neighbouring frequencies, or unilateral tinnitus, or (2) > or =15 dB asymmetry at two frequencies between 2 and 8 kHz.
Authors: Daniele Starnoni; Lorenzo Giammattei; Giulia Cossu; Michael J Link; Pierre-Hugues Roche; Ari G Chacko; Kenji Ohata; Majid Samii; Ashish Suri; Michael Bruneau; Jan F Cornelius; Luigi Cavallo; Torstein R Meling; Sebastien Froelich; Marcos Tatagiba; Albert Sufianov; Dimitrios Paraskevopoulos; Idoya Zazpe; Moncef Berhouma; Emmanuel Jouanneau; Jeroen B Verheul; Constantin Tuleasca; Mercy George; Marc Levivier; Mahmoud Messerer; Roy Thomas Daniel Journal: Acta Neurochir (Wien) Date: 2020-07-29 Impact factor: 2.216