Conclusions: Endoscopic retrolabyrinthine approach has an excellent visual angle in dealing with the facial nerve and related micro-vessels in the CPA.
OBJECTIVE To establish a kind of animal model with non-infectious conductive deafness and observe if the fixation of ossicular chain can cause hydrolabyrinth.
OBJECTIVE To discuss the applied anatomical study and clinical significance of the partial labyrinthectomy approach to the internal auditory canal (IAC) and the cerebellopontine angle (CPA).