“…Vestibular schwannomas (VS) amount to 80-90% of all pontocerebellar angle tumors 1 , 4 , 5 . They are slow-growth, benign tumors that originate in the vestibular segment of the VIII cranial nerve, mostly in the upper division of this segment 1 , 3 , 6 , 9 . These tumors derive histologically from Schwann cells, and appear more commonly inside the internal auditory meatus 1 , 2 , 3 , on the transition between central and peripheral myelin, known as the Obsteiner-Redlich zone.…”