Owing to distal light and a panoramic view, the endoscope expands the
view inside the cerebellopontine angle without touching the cerebellum
or the brain stem and allows clear identification of the vascular and
nervous components crossing the cerebellopontine angle. Using a retro
sigmoid approach with a combined surgical and endoscopic procedure, th
e surgeon gets more accurate information to visualize the adjacent str
uctures to a small acoustic neuroma, to check the lateral part of the
internal auditory canal, and to locate a vasculonervous cross-conflict
. In the future, an endoscopic vestibular neurotomy or an endoscopic m
icrovascular decompression seems to be a possible approach.