title: Transcranial resection of a large sinonasal juvenile psammomatoid ossifying fibroma.
abstract: BACKGROUND
  Juvenile psammomatoid ossifying fibroma (JPOF) is a benign but potentially locally aggressive fibroosseous lesion predominantly arising in the paranasal sinuses in children and young adults. Intracranial extension is rare but occurs sometimes. In such cases, tumor resection may often require the combination of neurosurgical and facial approaches. Histological diagnosis remains a challenge because the lesion can be easily mistaken for another fibroosseous lesion or for a meningioma.
  
  
  METHODS
  We report the case of a 12-year-old boy with a JPOF arising from the right paranasal sinuses and extension towards the anterior skull base and the orbit. Despite the tumor had eroded through nasal septum, medial orbit wall, and right maxilla, it could be entirely removed performing an extended frontobasal approach via a bifrontoorbital craniotomy, obviating the need for a transfacial approach.
  
  
  CONCLUSIONS
  Radiologically and histologically, the lesion could be mistaken either for a meningioma or another type of ossifying fibroma. Histological aspects and alternative surgical approaches to these rare entities are discussed.
authors.affiliation: Department of Neurosurgery, Maison Blanche Hospital, University of Reims, Reims, France. remynoudel@yahoo.fr
authors.forename: Rémy
authors.initials: R
authors.lastname: Noudel
authors.forename: Edouard
authors.initials: E
authors.lastname: Chauvet
authors.forename: Virginie
authors.initials: V
authors.lastname: Cahn
authors.forename: Jean Claude
authors.initials: JC
authors.lastname: Mérol
authors.forename: André
authors.initials: A
authors.lastname: Chays
authors.forename: Pascal
authors.initials: P
authors.lastname: Rousseaux
mesh_terms: D002648:Child; D003399:Craniotomy / Q000379:methods; D003937:Diagnosis, Differential; D018214:Fibroma, Ossifying / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D006801:Humans; D008297:Male; D011379:Prognosis; D012886:Skull / Q000000981:diagnostic imaging / Q000601:surgery; D012888:Skull Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome