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Anatomical basis of the extended subtemporal approach to the cerebellopontine angle: its value and limitations

Bases anatomiques de l'abord sous-temporal élargi de l'angle ponto-cérébreux: intérêt et limites

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Summary

The cerebellopontine angle is an anatomic region situated deeply at the anterolateral aspect of the brainstem, access to which is complicated by the presence of neurovascular bundles. The functional importance of these cranial n. (trigeminal, facial, vestibulo= cochlear, glossopharyngeal, vagus and accessory) calls for the use of special surgical routes of access in certain cases. In particular, tumors situated between the vestibulocochlear-facial bundle behind and the trigeminal n. in front are difficult to reach by the suboccipital and subtemporal transmeatal routes. The endeavor to preserve hearing in particular situations, where the side opposite the tumor is no longer functional, justifies the use of a subtemporal transmeatal route extended by opening the tentorium cerebelli. This anatomic and experimental surgical study deals with the possibilities of this route of approach.

Résumé

L'angle ponto-cérébelleux est une région anatomique profondément située à la face antérolatérale du tronc cérébral et dont l'accès est rendu délicat par la présence de pédicules vasculonerveux. L'importance fonctionnelle de ces n. crâniens (trijumeau, facial, vestibulo-cochléaire, glossopharyngien, vague et accessoire) justifie dans certains cas, l'utilisation de voies chirurgicales particulières. En effet, les processus tumoraux, situés entre le paquet acoustico-facial en arrière, et le n. trijumeau en avant, sont d'accès délicat par les voies sous-occipitale et sous-temporale transcanalaire. La tentative de préservation de l'audition dans les situations particulières où le côté contro-latéral à la tumeur n'est plus fonctionnel, justifie l'utilisation d'une voie anatomique sous-temporale transcanalaire élargie par ouverture de la tente du cervelet. L'étude anatomique et chirurgicale expérimentale expose les possibilités de cette voie d'abord.

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Supported by a grant from the Calouste Gulbenkian Foundation (Portugal)

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Dautheribes, M., Migueis, A., Vital, J.M. et al. Anatomical basis of the extended subtemporal approach to the cerebellopontine angle: its value and limitations. Surg Radiol Anat 11, 187–195 (1989). https://doi.org/10.1007/BF02337820

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  • DOI: https://doi.org/10.1007/BF02337820

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