title: Transnasal endoscopic surgery of post-operative maxillary cysts.
abstract: OBJECTIVE
  The present study investigates the indications for transnasal endoscopic surgery in treating post-operative maxillary cysts.
  
  
  METHODS
  In this retrospective study, the records of 118 patients with post-operative maxillary cysts (88 unilateral and 30 bilateral) consisting of 148 procedures were reviewed.
  
  
  RESULTS
  A transnasal endoscopic approach was performed in 144 lesions (97.3 per cent). A combined endonasal endoscopic and canine fossa (external) approach was performed in 4 of 148 lesions, because the cysts were located distant from the nasal cavity and had a thick bony wall. A ventilation stent was placed in four patients (four cysts) to avoid post-operative meatal antrostomy stenosis. Recurrence was observed in five patients (4.2 per cent), all of whom subsequently underwent transnasal endoscopic revision surgery.
  
  
  CONCLUSIONS
  Transnasal endoscopic surgery is an effective treatment for post-operative maxillary cyst with the exception of cysts located distant from the nasal cavity.
authors.affiliation: Department of Otorhinolaryngology,Graduate School of Medical Sciences, Kyushu University,Fukuoka,Japan.
authors.forename: M
authors.initials: M
authors.lastname: Sawatsubashi
authors.affiliation: Department of Otorhinolaryngology,Graduate School of Medical Sciences, Kyushu University,Fukuoka,Japan.
authors.forename: D
authors.initials: D
authors.lastname: Murakami
authors.affiliation: Division of Otolaryngology,Head and Neck Surgery,ENT Surgery Centre, Yuai-kai Oda Hospital,Kashima,Saga,Japan.
authors.forename: M
authors.initials: M
authors.lastname: Oda
authors.affiliation: Department of Otorhinolaryngology,Graduate School of Medical Sciences, Kyushu University,Fukuoka,Japan.
authors.forename: S
authors.initials: S
authors.lastname: Komune
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003251:Constriction, Pathologic / Q000517:prevention & control; D003560:Cysts / Q000601:surgery*; D004724:Endoscopy / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008443:Maxillary Sinus / Q000601:surgery*; D008875:Middle Aged; D009296:Nasal Cavity / Q000473:pathology / Q000601:surgery; D059747:Nasal Surgical Procedures / Q000379:methods*; D010254:Paranasal Sinus Diseases / Q000601:surgery*; D011183:Postoperative Complications / Q000601:surgery*; D012008:Recurrence; D012086:Reoperation; D012189:Retrospective Studies; D015607:Stents; D014691:Ventilation / Q000379:methods
keywords: Nascal cavity