<prompt> Which intervention is best in patients operated for bilateral acoustic neuroma for hearing rehabilitation?Brainstem hearing implantBilateral cochlear implantUnilateral cochlear implantHigh power hearing aid  <response>: Auditory brainstem implant ABI Brainstem implant is currently used only in patients with NF-2 and is always implanted simultaneously in the lateral recess of the fouh ventricle with tumor removal usually during excision of the patients second tumor. It is useful in patients who have had both cochleovestibular nerves sacrificed, since this implant stimulates the cochlear nuclear complex in the brainstem Such an implant is In unilateral acoustic neuroma, auditory brainstem implant ABI is not necessary as hearing is possible from the contralateral side but in bilateral acoustic neuroma as in neurofibromatosis-2, rehabilitation is required by ABI Dhingra 6thed 