title: [Nasoethmoidal psammomatoid cemento-ossifiying fibroma with intraorbital extension].
abstract: BACKGROUND
  Psammomatoid cemento-ossifying fibroma (PCOF) is a rare benign fibro-osseous lesion. It affects the maxilla, the nasal cavity, paranasal sinuses, and the ethmoid. It is slow-growing, progressive, and benign but it can be locally extended and mimic a malignant tumor.
  
  
  METHODS
  We report the unusual case of a 36-year-old woman with a nasal and ethmoid PCOF with orbital and endocranial extension. The tumor was revealed by exophthalmia and nasal obstruction. The diagnosis was proven histologicaly on biopsies. The treatment was transfacial surgery. There was no recurrence 1 year later.
  
  
  CONCLUSIONS
  Intraorbital and endocranial extension of PCOF are rare aggressive behaviours. Histologically, the differential diagnosis is difficult between fibrous dysplasia or psammomatoid meningioma. Complete surgical excision is necessary to prevent recurrence.
authors: Hôpital militaire d'instruction Mohamed V, Hay Riad, 10000 Rabat, Maroc. oukablimohamed@yahoo.fr <oukablimohamed@yahoo.fr>
authors: M
authors: M
authors: Oukabli
authors: A
authors: A
authors: Akhaddar
authors: O
authors: O
authors: Qamouss
authors: H
authors: H
authors: Chahdi
authors: M
authors: M
authors: Rimani
authors: A
authors: A
authors: Albouzidi
mesh_terms: D000328:Adult; D001706:Biopsy; D003937:Diagnosis, Differential; D005005:Ethmoid Sinus / Q000473:pathology*; D005094:Exophthalmos / Q000175:diagnosis; D005260:Female; D018214:Fibroma, Ossifying / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D015508:Nasal Obstruction / Q000175:diagnosis; D009361:Neoplasm Invasiveness; D009669:Nose Neoplasms / Q000175:diagnosis* / Q000473:pathology; D009918:Orbital Neoplasms / Q000175:diagnosis* / Q000473:pathology; D010255:Paranasal Sinus Neoplasms / Q000175:diagnosis* / Q000473:pathology; D012888:Skull Neoplasms / Q000175:diagnosis