[Pathology and surgery of tumors located under the internal auditory canal. 1. Neurinoma of mixed nerves].

The schwannomas of foramen jugulare are infrequent although progress in diagnosis of these tumors have been obtained by CT scan. We report five cases of the caudal nerves that where developed into the foramen jugulare. One may suspect these tumors in presence of any minimal, unilateral defect of otological, facial and pharyngo-laryngeal functions. The surgical approach to the tumors depends of both its location and its symptomatology. The mastoid-retro-sigmoid approach allow in most cases to preserve the eight and seven nerve functions.