title: Revision surgery for chronic otitis media: characteristics and outcomes in comparison with primary surgery.
abstract: OBJECTIVE
  To analyze the characteristics and outcomes of revision surgery for chronic otitis media (COM) with or without cholesteatoma, and to compare with those of primary surgery.
  
  
  METHODS
  A retrospective chart review was performed on 208 patients who underwent revision surgery for COM over an 8-year period (1997-2004) and 51 patients who underwent a primary canal wall down mastoidectomy (CWDM), and were followed for more than 12 months.
  
  
  RESULTS
  Recurrent or residual cholesteatoma was found in 49.5% of cases. The mastoid tip and perisinal air cells were the most frequent sites of residual air cells. As a result of revision surgery, a dry and safe ear was achieved in 88.5% of patients. A residual air-bone gap (ABG) of <or=30 dB was achieved in 70.1% of cases with a revision CWDM with ossiculoplasty. In comparison with 51 patients who underwent primary CWDM, the disease control rate was not different. However, postoperative hearing result after ossiculoplasty was worse and longer healing time was required after revision surgery.
  
  
  CONCLUSIONS
  The characteristics and surgical outcome of recurrent COM must be fully understood for complete control of the disease.
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, Sungkyunkwan University School of Medicine, Samsung Medical Center, 50 Irwon-dong Gangnam-ku, Seoul 135-710, South Korea. yscho@skku.edu
authors.forename: Yang-Sun
authors.initials: YS
authors.lastname: Cho
authors.forename: Sang Duk
authors.initials: SD
authors.lastname: Hong
authors.forename: Kyu Whan
authors.initials: KW
authors.lastname: Chung
authors.forename: Sung Hwa
authors.initials: SH
authors.lastname: Hong
authors.forename: Won-Ho
authors.initials: WH
authors.lastname: Chung
authors.forename: Shin Hong
authors.initials: SH
authors.lastname: Park
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D018424:Cholesteatoma, Middle Ear / Q000453:epidemiology / Q000601:surgery; D002908:Chronic Disease; D004424:Ear Canal / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D008297:Male; D008416:Mastoid / Q000601:surgery; D008875:Middle Aged; D019933:Ossicular Replacement / Q000379:methods; D010033:Otitis Media / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000601:surgery*; D013506:Otologic Surgical Procedures / Q000379:methods*; D012086:Reoperation / Q000379:methods*; D012189:Retrospective Studies; D013701:Temporal Bone / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D014433:Tympanoplasty; D014945:Wound Healing; D055815:Young Adult