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Role of magnetic resonance imaging in predicting late facial motor function after removal of vestibular schwannomas by the translabyrinthine approach

Published online by Cambridge University Press:  29 June 2007

Guy Moulin ,
Patrick Dessi ,
Philippe André ,
Maurice Cannoni ,
William Pellet ,
Michel Zanaret ,
Bruno Emram ,
Christophe Chagnaud ,
Bernard Giusano  and
Jean-Michel Bartoli
Guy Moulin*
Affiliation:
Department of Radiology, Groupe Hospitalier de Ia Timone, 13385 Marseille, Cedex 5, France.
Patrick Dessi
Affiliation:
Department of Otorhinolaryngology–Head and Neck Surgery, Groupe Hospitalier de Ia Timone, 13385 Marseille, Cedex 5, France.
Philippe André
Affiliation:
Department of Radiology, Groupe Hospitalier de Ia Timone, 13385 Marseille, Cedex 5, France.
Maurice Cannoni
Affiliation:
Department of Otorhinolaryngology–Head and Neck Surgery, Groupe Hospitalier de Ia Timone, 13385 Marseille, Cedex 5, France.
William Pellet
Affiliation:
Department of Otorhinolaryngology–Head and Neck Surgery, Groupe Hospitalier de Ia Timone, 13385 Marseille, Cedex 5, France.
Michel Zanaret
Affiliation:
Department of Otorhinolaryngology–Head and Neck Surgery, Groupe Hospitalier de Ia Timone, 13385 Marseille, Cedex 5, France.
Bruno Emram
Affiliation:
Department of Otorhinolaryngology–Head and Neck Surgery, Groupe Hospitalier de Ia Timone, 13385 Marseille, Cedex 5, France.
Christophe Chagnaud
Affiliation:
Department of Radiology, Groupe Hospitalier de Ia Timone, 13385 Marseille, Cedex 5, France.
Bernard Giusano
Affiliation:
Department of Otorhinolaryngology–Head and Neck Surgery and Statistics, Groupe Hospitalier de Ia Timone, 13385 Marseille, Cedex 5, France.
Jean-Michel Bartoli
Affiliation:
Department of Radiology, Groupe Hospitalier de Ia Timone, 13385 Marseille, Cedex 5, France.
*
Address for correspondence: Dr Guy Moulin, Department of Radiology, Groupe Hospitalier de Ia Timone, 13385 Marseille. Cedex 5. France. Fax: 91-38-60-26
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Abstract

Facial motor function was assessed in 61 patients 18 months after surgical resection, by the translabyrinthine approach, of vestibular schwannoma involving both the cerebellopontine angle (CPA) and the auditory canal.

Pre-operative magnetic resonance imaging (MRI) was performed to measure the maximum extracanalicular diameter of the tumour between the porus and the farthest extension in the CPA on tranverse slices and to calculate extracanalicular tumour volume. Post-operative facial motor function was graded according to the House and Brackmann system.

There was a statistically significant relationship between late facial motor function and extracanalicular diameter. The best cut-off point for good and poor results was 20mm. There was no relationship between the tumour volume and the late post-operative facial motor function grade.

In this study the best pre-operative radiological predictor of the late facial motor function in patients operated on by the translabyrinthine approach was the maximum diameter measured byMRI.

Keywords

Vestibular schwannomaFacial nerveMagnetic resonance imaging
Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 109 , Issue 5 , May 1995 , pp. 394 - 398
Copyright
Copyright © JLO (1984) Limited 1995

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