gms | German Medical Science

59th Annual Meeting of the German Society of Neurosurgery (DGNC)
3rd Joint Meeting with the Italian Neurosurgical Society (SINch)

German Society of Neurosurgery (DGNC)

1 - 4 June 2008, Würzburg

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Tumor origin and hearing preservation in vestibular schwannoma surgery

Tumorursprung und Hörerhalt bei Vestibularisschwannomen

Meeting Abstract

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  • corresponding author C. Strauss - Neurochirurgische Klinik der Martin-Luther-Universität Halle-Wittenberg
  • S. Rampp - Neurochirurgische Klinik der Martin-Luther-Universität Halle-Wittenberg
  • J. Rachinger - Neurochirurgische Klinik der Martin-Luther-Universität Halle-Wittenberg
  • C. Scheller - Neurochirurgische Klinik der Martin-Luther-Universität Halle-Wittenberg
  • J. Prell - Neurochirurgische Klinik der Martin-Luther-Universität Halle-Wittenberg

Deutsche Gesellschaft für Neurochirurgie. Società Italiana di Neurochirurgia. 59. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie e.V. (DGNC), 3. Joint Meeting mit der Italienischen Gesellschaft für Neurochirurgie (SINch). Würzburg, 01.-04.06.2008. Düsseldorf: German Medical Science GMS Publishing House; 2008. DocMI.01.05

The electronic version of this article is the complete one and can be found online at: http://www.egms.de/en/meetings/dgnc2008/08dgnc213.shtml

Published: May 30, 2008

© 2008 Strauss et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.en). You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.

Outline

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Objective: Preservation of cochlear nerve function in vestibular schwannoma removal is usually dependent on tumor size and preoperative hearing status. Tumor origin as an independent factor has not been systematically investigated.

Methods: A series of 44 patients with vestibular schwannomas, operated upon between 2002 and 2005 via the suboccipito-lateral route was evaluated with respect to cochlear nerve function, tumor size, radiological findings and intraoperative tumor origin. All patients were re-evaluated 12 months following surgery.

Results: Despite significantly larger tumor sizes and comparable preoperative cochlear nerve status, hearing preservation was achieved in 43% of patients with tumor origin from the superior vestibular nerve as compared to 11% of those with tumor origin from the inferior vestibular nerve.

Conclusions: Tumor origin is an independent prognostic factor for cochlear nerve preservation in vestibular schwannoma surgery. If diagnosed before surgery on 3D CISS MRI sequences, treatment management may be adopted accordingly.