Is the middle fossa approach the treatment of choice for intracanalicular vestibular schwannoma?

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書誌事項

公開日
2005-03
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1016/j.otohns.2004.09.027
公開者
Wiley

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<jats:sec><jats:title>OBJECTIVES</jats:title><jats:p><jats:bold>To compare the 2 surgical techniques most commonly used during vestibular schwannoma (VS) surgery, i.e., the middle fossa (MF) and the retrosigmoid‐transmeatal (RS‐TM) routes, when hearing preservation is attempted.</jats:bold></jats:p></jats:sec><jats:sec><jats:title>STUDY DESIGN</jats:title><jats:p><jats:bold>A longitudinal study of a series of consecutive patients operated on with the 2 techniques by the same surgeon was conducted. Selection criteria included tumor confined to the internal auditory canal (IAC) with a length ranging from 4 to 12 mm and hearing class A or B. Patients were alternately assigned to 1 of the 2 groups regardless of auditory class and distance of the tumor from the IAC fundus. Thirty‐five subjects were operated on with the RS‐TM technique and 35 via the MF route.</jats:bold></jats:p></jats:sec><jats:sec><jats:title>RESULTS</jats:title><jats:p><jats:bold>No significant differences in auditory and facial nerve function results between the 2 techniques were observed. The RS‐TM approach, however, showed better facial nerve results at discharge. VS size, IAC enlargement, and, particularly, the distance from the IAC fundus were found to influence the postoperative results more than the type of approach itself.</jats:bold></jats:p></jats:sec><jats:sec><jats:title>CONCLUSIONS</jats:title><jats:p><jats:bold>The MF approach has been described as being the better technique for VS surgery in terms of auditory results. However, this claim lacks statistical substantiation because no prospective studies are to be found in the literature. The present longitudinal investigation shows that the MF approach does not afford any particular advantages over the RS‐TM route in terms of auditory results in intracanalicular VS, with the exception of tumors reaching the IAC fundus.</jats:bold></jats:p></jats:sec>

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