title: The evaluation of the angles of Eustachian tubes in the patients with chronic otitis media on the temporal computerized tomography.
abstract: BACKGROUND
  Chronic otitis media (COM), affecting all over the world and in a wide range of age groups in Turkey, is an important cause of ear discharge and hearing loss. The main clinical manifestations are tympanic membrane perforation, ear, nose and throat problems. On the tympanic membrane perforation becomes persistent and cholesteatoma development, there are a lot of opinions today. Especially in the pathology associated with otitis media with effusion eustachian tube, it is known that COM and cholesteatoma develop.
  
  
  METHODS
  In our study, we interpreted 210 patients' temporal computed tomography (CT). Seventy of these 210 patients had otitis media with cholesteatoma, 70 patients had only otitis media without cholesteatoma, and 70 patients had no otitis media. The eustachian tubes were evaluated using temporal CT multiplanar reconstruction method. Angles with the horizontal plane of the eustachian tube and Reid and tubotympanic angles were measured.
  
  
  RESULTS
  The angles between eustachian tube and horizontally oriented Reid plane of the patients with cholesteatoma were found to be significantly lower than the patients with otitis media without cholesteatoma and the patients with no history of otitis media. For the tubotympanic angle, no statistically significant differences were observed between the groups.
  
  
  CONCLUSIONS
  These results suggest that the decrease in the angle with the horizontal plane of Reid in the eustachian tube in adults may play a significant role in the etiology of cholesteatoma.
authors.affiliation: Department of Radiology, Bakirkoy Dr. Sadi Konuk Research and Training Hospital, Bakırköy, Istanbul, Turkey.
authors.forename: S
authors.initials: S
authors.lastname: Aksoy
authors.forename: I
authors.initials: I
authors.lastname: Sayin
authors.forename: Z M
authors.initials: ZM
authors.lastname: Yazici
authors.forename: F T
authors.initials: FT
authors.lastname: Kayhan
authors.forename: A
authors.initials: A
authors.lastname: Karahasanoglu
authors.forename: E
authors.initials: E
authors.lastname: Hocaoglu
authors.forename: E
authors.initials: E
authors.lastname: Inci
mesh_terms: D000293:Adolescent; D000328:Adult; D018424:Cholesteatoma, Middle Ear / Q000000981:diagnostic imaging* / Q000453:epidemiology / Q000503:physiopathology; D002908:Chronic Disease; D005064:Eustachian Tube / Q000000981:diagnostic imaging* / Q000503:physiopathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010033:Otitis Media / Q000000981:diagnostic imaging* / Q000453:epidemiology; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014421:Turkey / Q000453:epidemiology