Improvement of otoendoscopic surgery for epitympanic cholesteatoma invading the mastoid.
BACKGROUND
In recent years, the otoendoscopic surgery for epitympanic cholesteatoma has achieved great development, but it still has some disadvantages.


OBJECTIVE
This work aims to improve otoendoscopic surgery for epitympanic cholesteatoma invading the mastoid to retain the normal structure of the middle ear as much as possible.


METHODS
We classified the patients according to the lesion scope and applied different strategies of using the combination of otoendoscope and microscope. The surgery was improved and the recurrence and residual of middle ear cholesteatoma after operation were observed preliminarily.


RESULTS
Forty-six patients with middle ear cholesteatoma accepted surgical treatment, including 10 cases of independent otoendoscopic surgery, 29 cases of otoendoscope-microscope combined surgery, and seven cases of microscopic surgery assisted with an otoendoscope. All cases were treated with canal-up cholesteatoma surgery. The postoperative recurrent rate was 4/46.


CONCLUSION
We improved existing otoendoscopic surgery to reduce or avoid bony defects of the acoustic meatus, and then decreased the proportion of canal-down surgery.
['Wu|Nan|N|', 'Wang|Fangyuan|F|', 'Hou|Zhaohui|Z|', 'Yang|Shiming|S|']
D000328:Adult D000367:Age Factors D000368:Aged D018424:Cholesteatoma, Middle Ear D015331:Cohort Studies D004724:Endoscopy D005260:Female D005500:Follow-Up Studies D006801:Humans D008297:Male D008416:Mastoid D008875:Middle Aged D013506:Otologic Surgical Procedures D038781:Otoscopy D011446:Prospective Studies D018570:Risk Assessment D012720:Severity of Illness Index D012737:Sex Factors D016896:Treatment Outcome D014432:Tympanic Membrane
Otoendoscope epitympanic cholesteatoma microscope transcanal approach