Fig. 1.

Schematic drawings of tumor extensions from the inner ear to the internal auditory canal. a Intracochlear schwannoma with transmodiolar extension. b Intravestibulocochlear schwannoma with transmodiolar extension. c Intravestibular schwannoma (+ partially semicircular canals) with transmacular extension. Additional growth into the cerebellopontine angle is also possible (not shown). The facial nerve is located cranially to the cochlear nerve and thus not shown. For simplification, only one vestibular nerve is shown. (Artist: Hans Jörg Schütze, Medical Illustrator, Köln, Germany)