title: Preoperative magnetic resonance imaging for localization of the origin of maxillary sinus inverted papillomas.
abstract: OBJECTIVE
  It is essential to precisely localize the origin of an inverted papilloma within the maxillary sinus by preoperative imaging so that the lesion can be excised as thoroughly as possible. In the present study, we evaluated the use of preoperative magnetic resonance imaging (MRI) for pinpoint localization of the origin of inverted papillomas.
  
  
  METHODS
  The subjects were patients with an inverted papilloma of the maxillary sinus. Given the known histopathological features and pattern of growth of this tumor, we obtained preoperative MRIs in an attempt to localize its origin.
  
  
  RESULTS
  When different interpretation methods were applied to the preoperative MRIs, there was up to an 85.7% correlation with the surgical results for localization of the tumor origin.
  
  
  CONCLUSIONS
  We were able to demonstrate a high rate of agreement between diagnostic imaging and the actual surgical findings in identification of the origin of inverted papillomas.
authors.affiliation: Department of Otorhinolaryngology, Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo 105-8461, Japan. Jirougood@aol.com
authors.forename: Jirou
authors.initials: J
authors.lastname: Iimura
authors.forename: Nobuyoshi
authors.initials: N
authors.lastname: Otori
authors.forename: Hiroya
authors.initials: H
authors.lastname: Ojiri
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Moriyama
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004724:Endoscopy; D005260:Female; D006801:Humans; D007432:Intraoperative Period; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008443:Maxillary Sinus / Q000473:pathology / Q000601:surgery; D008444:Maxillary Sinus Neoplasms / Q000175:diagnosis* / Q000601:surgery; D008875:Middle Aged; D018308:Papilloma, Inverted / Q000175:diagnosis* / Q000601:surgery; D011300:Preoperative Care