title: Endoscopic surgery for inverted papilloma originating from the sphenoid sinus and related clinical characteristics.
abstract: CONCLUSIONS
  Bony changes on CT imaging of inverted papilloma (IP) are useful for predicting tumor origin and recurrence sites. Because the lateral wall and floor of the sphenoid sinus are the most common origin and recurrence sites, the anterior wall of the sphenoid sinus should be opened as wide as the lateral wall and inferiorly to the level of the floor, especially in deeply pneumatized sphenoid sinuses.
  
  
  OBJECTIVE
  The incidence of isolated sphenoid IP is exceedingly low. So far, there have not been studies on the usual origin and recurrence sites of the sphenoid sinus. We sought to identify the sites of origin and recurrence and describe clinical characteristics, radiological features, and proper endoscopic management.
  
  
  METHODS
  We retrospectively reviewed medical records of patients with IP of the sphenoid sinus. Data collection included clinical presentations, origin and recurrent sites, radiological features, and surgical methods.
  
  
  RESULTS
  Seven patients were identified. The most common symptoms were headache and nasal obstruction. Radiological findings showed that most tumors extended into the nasal cavity or ethmoid sinus combined frequently with erosion of the lateral wall or intersinus septum. We noted simultaneous attachment to multiple walls in five subjects, including both lateral wall and floor attachment in three subjects.
authors.affiliation: Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Hyung-Ju
authors.initials: HJ
authors.lastname: Cho
authors.forename: Jin-Kook
authors.initials: JK
authors.lastname: Kim
authors.forename: Kyubo
authors.initials: K
authors.lastname: Kim
authors.forename: Yoo-Suk
authors.initials: YS
authors.lastname: Kim
authors.forename: Jeung-Gweon
authors.initials: JG
authors.lastname: Lee
authors.forename: Joo-Heon
authors.initials: JH
authors.lastname: Yoon
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D004724:Endoscopy; D005005:Ethmoid Sinus / Q000473:pathology / Q000601:surgery; D005260:Female; D006261:Headache / Q000209:etiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009296:Nasal Cavity / Q000473:pathology / Q000601:surgery; D015508:Nasal Obstruction / Q000209:etiology; D009361:Neoplasm Invasiveness; D009364:Neoplasm Recurrence, Local; D018308:Papilloma, Inverted / Q000175:diagnosis / Q000601:surgery*; D010255:Paranasal Sinus Neoplasms / Q000175:diagnosis / Q000601:surgery*; D012189:Retrospective Studies; D013101:Sphenoid Sinus / Q000473:pathology / Q000601:surgery*; D014057:Tomography, X-Ray Computed