title: [Evaluation of hearing results after tympanoplasty according to the classification of the development degree for pars flaccid cholesteatoma].
abstract: Our surgical treatment for middle ear cholesteatoma is based on the following 2 concepts: (1) Preservation of the physiological morphology and function of the middle ear, that is, maximal preservation of the posterior wall of the external auditory meatus and the middle ear mucosa and (2) Careful resection of the matrix membrane of the cholesteatoma through the continuity of the matrix membrane. In case the cholesteatoma matrix membrane is ruptured, a staged operation should be performed to prevent the development of residual cholesteatoma from the residual matrix. In this study, we classified a total of 238 cases of the pars flaccida cholesteatoma primary operated on Osaka Red Cross Hospital between January 2006 and March 2008 according to the Classification and Staging of Cholesteatoma proposed in 2010. The age of the patients ranged from 4 to 79 years (average: 49.8 years) and there were 123 males and 115 females. Follow up ranged from 1 year to 5 years with a mean follow-up period of 47.8 months. Regarding the stage, 38 (16.0%) ears had stage I cholesteatoma, 155 (65.1%) ears had stage II, and 45 (18.9%) ears had stage III. The successful outcome rate was 97.4% for stage I, 78.7% for stage II and 60.0% for stage III. The rate of the residue and the postoperative recurrence was 2.5% and 4.2%.
authors.affiliation: Department of Otorhinolaryngology, Kansai Electric Power Hospital.
authors.forename: Tadahiko
authors.initials: T
authors.lastname: Wada
authors.forename: Michitaka
authors.initials: M
authors.lastname: Iwanaga
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Hakuba
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Hiratsuka
authors.forename: Yohei
authors.initials: Y
authors.lastname: Kumabe
authors.forename: Takao
authors.initials: T
authors.lastname: Yoshida
authors.forename: Akihiko
authors.initials: A
authors.lastname: Fujita
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D018424:Cholesteatoma, Middle Ear / Q000473:pathology / Q000503:physiopathology* / Q000601:surgery; D005260:Female; D006309:Hearing / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D055502:Secondary Prevention; D016896:Treatment Outcome; D014432:Tympanic Membrane / Q000601:surgery*; D014433:Tympanoplasty / Q000379:methods; D055815:Young Adult