الفهرس 
The role of otoendoscope in detecting residual disease in cholesteatoma surgery
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Abstract
Introduction: Cholesteatoma surgery remains a difficult venture for even the most skilled otologist. Residual cholesteatoma is among the major causes of failure in surgical treatment of cholesteatoma.Residual cholesteatoma is due to incomplete removal at primary surgery by microscope and is often due to incomplete clearance of inaccessible areas such as sinus tympani. The aim of this work is to evaluate the role of the microscope assisted otoendoscopy in the surgical management of choleasteatoma. Patients and methods: Forty patients were underwent ear surgery for cholesteatoma using canal wall up and canal wall down techniques. Surgery was performed initially using surgical microscope. After complete microscopic work, the areas of sinus tympani, anterior epitympanic recess, facial recess, Eustachian tube and hypotympanum would be examined by otoendoscopy. Residual cholesteatoma would be identified and reported. Results: Residual cholesteatoma was found by endoscope in 10 sites as 6 in sinus tympani, 3 in anterior epitympanic recess and 1 in facial recess. These 10 sites were divided into 4 in modified radical mastoidectomy and 6 in conservative approaches. Conclusion: Endoscopic assisted ear surgery had much increase benefit in Cholesteatoma surgery. Endoscopic guided surgery had become a crucial complement to the operating microscope through visualizing hidden areas of the middle ear cleft and discovering any residual disease in such areas as the sinus tympani