Bone-anchored hearing aid in unilateral inner ear deafness: electrophysiological results in patients following vestibular schwannoma removal.

Conclusions: The results show that the healthy cochlea perceives one auditory stimulus from two auditory signals: the first through normal air conduction and the second provided by the bone-anchored hearing aid (BAHA). This artificial acoustic difference could partly explain 'pseudo' binaural hearing. Functional cerebral imaging using the same experimental procedure is now necessary.

[Meningiomas of the posterior petrous bone: diagnostic and therapeutic aspects].

Objective: To compare the clinical and paraclinical picture and the postoperative results of meningiomas of the posterior petrous bone and to compare them with those of vestibular schwannomas (VSs) operated on by the same surgical team.

Material And Method: A retrospective study of 27 patients (23 females) operated on for meningioma of the posterior petrous bone between 1994 and 2004. These were compared with 424 patients with VS operated on between October 1994 and January 2001.

Intralabyrinthine schwannomas: symptoms and managements.

Objective: To describe the characteristic presentations, radiologic findings and managements of the intralabyrinthine schwannomas.

Method: Retrospective review of patient records, their managements, and review of the literature.

Result: Four patients with a variety of otologic symptoms including hearing loss, vertigo, and tinnitus were found to have a schwannomas involving the labyrinth.