الفهرس 
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Abstract
This thesis is a comparative study of the mortality and morbid¬ity of the principle surgical approaches to the internal auditory meatus in Denmark. The surgical anatomy of the temporal bone and tie internal auditory meatus is reviewed. The technique of the middle fossa, the suboccipital and the translabyrinthine approaches have been fully described. The study includes: 1) Application of the translabyrinthine approach to 15 human temporal bones. The approach has been carried out in exactly the same way as in patients with large acoustic neuromas. 2) The results concerning mortality and morbidity of 50 consec¬utive acoustic neuromas removed via the translabyrinthine approach, and 10 neuromas removed via the middle fossa ap¬proach, have been compared with the other published results and with the results of the suboccipital tumor removal in r. Denmark. 3) A video study of 46 acoustic neuromas removed via the aritranslabyrinthine approach, analysing and grading all possible traumas to the facial nerve during tumor removal, and correla¬ting these results to the actual postoperative facial nerve function at different times after surgery. 4) The various diagnostic algorithms for reaching an early diagnosis of an acoustic neuroma have been discussed. This comparative study have lead to the following conclusions 1) Centralization of this surgery and through this the aquici-sion of experience is the main factor in reducing morbidity.