title: Endoscopic removal of large orbito-ethmoidal osteoma in pediatric patient: Case report.
abstract: BACKGROUND
  Osteoma is a benign slow growing bone tumor with a prevalence of 3% of all benign paranasal sinuses tumors, with a peak incidence between the fourth and sixth decades, mostly involving frontal sinuses.(1) PRESENTATION OF CASE: We present a case of a large right ethmoidal sinus osteoma in a 12-year-old boy, complaining of frontal headaches and excessive lacrimation of the right eye. CT scan showed a very large tumor in the right anterior ethmoidal sinus (30mm×25mm×15mm).
  
  
  CONCLUSIONS
  Large osteomas of the paranasal sinuses are usually resected by external approaches. However, the minimally invasive endonasal approach, which minimizes external facial scarring, is challenging for such large lesions in pediatrics. In the presented case, the osteoma was successfully resected exclusively by endoscopy-guided endonasal approach assisted by neuronavigation, with no peri or postoperative complications.
  
  
  CONCLUSIONS
  An endoscopic approach assisted with neuronavigation may be a minimally invasive and safe procedure for managing large osteoma of the ethmoidal sinus in pediatrics patients.
authors.affiliation: Otorhinolaryngology Department, Kremlin-Bicêtre Hospital, Assistance Publique Hopitaux de Paris (AP-HP), Le Kremlin Bicêtre, France. Electronic address: naif.alotaibi@u-psud.fr.
authors.forename: Naif
authors.initials: N
authors.lastname: Alotaibi
authors.forename: Julien
authors.initials: J
authors.lastname: Hanss
authors.forename: Farida
authors.initials: F
authors.lastname: Benoudiba
authors.forename: Serge
authors.initials: S
authors.lastname: Bobin
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Racy
keywords: Benign paranasal sinuses tumors; Ethmoidal sinus osteoma; Osteoma; Pediatric ethmoidal osteoma