[Endoscopic middle ear surgery].

Endoscopic transcannal middle ear surgery via natural route allows minimal surgery procedure which avoids incision of auricula and protects mastoid air cells. Utilizing endoscope of different angles provides excellent views of the "hidden corner" in middle ear, therefore helping surgeons better get rid of reduce residual pathological tissues. Surgeons in otology should understand middle ear anatomy and physiology as well as master the use of endoscopic surgical instruments to perform procedures well. treatment methods was present so as to further improve the understanding of such kind of tumor.