title: [Aneurysmal bone cyst of the ethmoid: paralateronasal or endoscopic surgery? Case report].
abstract: OBJECTIVE
  To report a typical case operated on under endonasal endoscopic surgery.
  
  
  METHODS
  A 20 year old girl came to the clinic with a left eye exophtalmus. Nasal endoscopy revealed a tumour developped into the left nasal fossa. Imaging allowed to suspect an ethmoidal aneurysmal cyst. CT showed a large tumour involving the left ethmoid, extending into the frontal and maxillary sinuses, with a fluid level in the middle of the tumour. MRI eliminated intracranial extension, showed a cystic component in the middle of the tumour and the presence of hemosiderin signals on T2. Complete resection of the tumour was performed under endoscopic endonasal surgery thanks to a cleavage plane between tumour periorbit and dura. Follow-up was simple with no recurrence at 2 years.
  
  
  CONCLUSIONS
  Despite its rarity, this tumour needs to be known by ENT surgeons, and our surgical experience demonstrates that it can be resected endoscopically.
authors.affiliation: Hôpital Central, Service d'ORL et de Chirurgie Cervico-Faciale, 29 avenue du Maréchal de Lattre de Tassigny, 54000 Nancy, France.
authors.forename: S
authors.initials: S
authors.lastname: Cortese
authors.forename: R
authors.initials: R
authors.lastname: Jankowski
authors.forename: S
authors.initials: S
authors.lastname: Kacha
authors.forename: J M
authors.initials: JM
authors.lastname: Vignaud
authors.forename: P
authors.initials: P
authors.lastname: Gallet
authors.forename: S A
authors.initials: SA
authors.lastname: Meghachi
mesh_terms: D017824:Bone Cysts, Aneurysmal / Q000601:surgery*; D004724:Endoscopy; D005004:Ethmoid Bone; D005260:Female; D006801:Humans; D013517:Otorhinolaryngologic Surgical Procedures / Q000379:methods; D055815:Young Adult