title: Relationships between facial canal dehiscence and other intraoperative findings in chronic otitis media with cholesteatoma.
abstract: OBJECTIVE
  We investigated the relationship between facial canal dehiscence and intraoperative middle ear and mastoid findings in patients operated on for cholesteatoma.
  
  
  METHODS
  We examined retrospectively 334 patients who had been operated on for cholesteatoma in Izmir Katip Celebi University, Ataturk Research and Training Hospital, ENT Clinic, between April 1997 and April 2010. The patients were examined for facial canal dehiscence according to age, gender, side of the ear, surgery type, first or revision surgery, localization of the facial canal dehiscence, spread of the cholesteatoma, with the presence of lateral semi-circular canal (LSCC) fistula and any defect in the ossicle chain, and destruction in the posterior wall of the external auditory canal(EAC).
  
  
  RESULTS
  Of the patients, 23.6% had facial canal dehiscence and detected most commonly in the right ear 28.9% and tympanic segment, 83.5%. Facial canal dehiscence was found to be 24.2-fold more common in patients with LSCC fistula and 4.1-fold more common in patients with destruction in the posterior wall of the (EAC). In patients located cholesteatoma in tympanic cavity+antrum and the tympanic cavity+all mastoid cells and with incus and stapes defect, increased incidence of dehiscence. Age, first or revision operation and canal wall down tympanoplasty (CWDT) or canal wall up tympanoplasty (CWUT) did not affect the incidence of dehiscence.
  
  
  CONCLUSIONS
  That the likelihood of facial canal dehiscence occurrence is increased in patients with LSSC fistulas, destruction in the posterior wall of the EAC, or a stapes defect is important information for surgeons.
authors.affiliation: Department of Otorhinolaryngology and Head and Neck Surgery, İzmir Training and Research Hospital, Izmir, Turkey.
authors.forename: Filiz
authors.initials: F
authors.lastname: Gülüstan
authors.affiliation: Department of Otorhinolaryngology and Head and Neck Surgery, İzmir Katip Çelebi Universty Atatürk Research and Training Hospital, Izmir, Turkey. Electronic address: drhaleaslan@gmail.com.
authors.forename: Hale
authors.initials: H
authors.lastname: Aslan
authors.affiliation: Department of Otorhinolaryngology and Head and Neck Surgery, İzmir Katip Çelebi Universty Atatürk Research and Training Hospital, Izmir, Turkey.
authors.forename: Murat
authors.initials: M
authors.lastname: Songu
authors.affiliation: Department of Otorhinolaryngology and Head and Neck Surgery, İzmir Katip Çelebi Universty Atatürk Research and Training Hospital, Izmir, Turkey.
authors.forename: Mehmet Sinan
authors.initials: MS
authors.lastname: Başoğlu
authors.affiliation: Department of Otorhinolaryngology and Head and Neck Surgery, İzmir Katip Çelebi Universty Atatürk Research and Training Hospital, Izmir, Turkey.
authors.forename: Hüseyin
authors.initials: H
authors.lastname: Katılmış
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D018424:Cholesteatoma, Middle Ear / Q000453:epidemiology* / Q000601:surgery; D002908:Chronic Disease; D020220:Facial Nerve Injuries / Q000453:epidemiology / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010033:Otitis Media / Q000453:epidemiology* / Q000601:surgery; D012189:Retrospective Studies; D012665:Semicircular Canals / Q000473:pathology; D055815:Young Adult