title: Juvenile psammomatoid ossifying fibroma in paranasal sinus and skull base.
abstract: CONCLUSIONS
  The endoscopic transnasal approach with IGS is a safe and effective technique, allowing completely resection of JPOF, with minimal morbidity and recurrence.
  
  
  OBJECTIVE
  JPOF is a benign but locally aggressive fibro-osseous lesion. This study presents a series of JPOF cases, involving anterior skull base and orbit, treated by endoscopic transnasal approach with image guidance system (IGS) to resect the mass completely.
  
  
  METHODS
  This study retrospectively reviewed the clinical presentations, surgical procedures, and complications of 11 patients with JPOF who were treated by endoscopic approach from May 2009 to April 2014. All patients were followed by endoscopic and CT scan evaluations during follow-up.
  
  
  RESULTS
  All of the 11 cases were boys, with a mean age of 11.8 years (range = 6-17 years). The size of mass in the paranasal sinus ranged from 2.5-4.6 cm in greatest dimension (mean = 3.7 cm), and the medial orbital wall and cranial base were involved in all patients. All 11 patients received successful operation and were relieved from symptoms without mortality and major complications. During follow-up (range from 17-67 months; mean follow-up = 25.8 months), only one patient was recurrent in local position. The skull base partial resected during surgery was found to rebuild after 1 year.
authors.affiliation: a Department of Otolaryngology Head and Neck Surgery , Beijing Tongren Hospital Capital Medical University , Beijing , PR China.
authors.forename: Mingjie
authors.initials: M
authors.lastname: Wang
authors.affiliation: a Department of Otolaryngology Head and Neck Surgery , Beijing Tongren Hospital Capital Medical University , Beijing , PR China.
authors.forename: Bing
authors.initials: B
authors.lastname: Zhou
authors.affiliation: a Department of Otolaryngology Head and Neck Surgery , Beijing Tongren Hospital Capital Medical University , Beijing , PR China.
authors.forename: Shunjiu
authors.initials: S
authors.lastname: Cui
authors.affiliation: a Department of Otolaryngology Head and Neck Surgery , Beijing Tongren Hospital Capital Medical University , Beijing , PR China.
authors.forename: Yunchuan
authors.initials: Y
authors.lastname: Li
mesh_terms: D000293:Adolescent; D002648:Child; D018214:Fibroma, Ossifying / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D006801:Humans; D008297:Male; D010255:Paranasal Sinus Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D012189:Retrospective Studies; D012886:Skull / Q000000981:diagnostic imaging / Q000473:pathology; D019292:Skull Base Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*
keywords: Juvenile psammomatoid ossifying fibroma; endoscopic sinus surgery; image-guided surgery; skull base