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[Acoustic neurinomas. Trans-labyrinthine approach (author's transl)].

The authors, supporters of a tight oto-neuro-surgical collaboration, show their tactical evolution in front of acoustic neurinomas which they operated at first in two stages, trans-labyrinthine then sub-occipital, and now they approach only by trans-labyrinthine way. They report their experience and their results to the point of a first serie of 30 cases : 10 combined approaches in two stages, and 20 trans-labyrinthine approaches. The mortality (3 cases-10%) for this first serie is still raised. One patient, after a softening of the pons, maintained important sequelles. On the other hand, among the remaining 26 patients, 13 kept a normal facial motricity and 5 recovered but with syncinesis. These first results are still perfectible : among the 20 last cases only trans-labyrinthine approached the facial nerve preservation was realised in 72% of the cases. The most frequent surgical complication is a cerebro-spinal fluid leak (7 cases) which fortunately the most often spontaneously dry up (6 cases) but which justify a very attentive closure technic. The authors show the arguments which convinced them of the interest of the trans-labyrinthine approach such it is done by W. House.