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Translabyrinthine Exposure

Surgical Correlation


E, Enlarged view of the exposure in the cerebellopontine angle. In this case, the glossopharyngeal and vagus nerves can be seen, although, in the translabyrinthine exposure, the jugular bulb often obstructs the view of the nerves entering the jugular foramen. F, The vestibulocochlear nerve has been elevated to expose the facial nerve. G, The labyrinthine, tympanic, and mastoid segments of the facial nerve have been exposed in preparation for transposition of the nerve for a transcochlear approach. H, The facial nerve has been transposed backward and the bone anterior to the meatal fundus has been removed to expose the cochlea for a transcochlear approach in which the cochlea is removed to gain access to the side of the clivus and front of the brainstem. The cochlear nerve has been divided. The cochlear fibers innervating the cochlear duct pass through the modiolus. (Images courtesy of AL Rhoton, Jr.)

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