title: Juvenile psammomatoid ossifying fibroma of the posterior fossa: a case report and review.
abstract: BACKGROUND
  Ossifying fibroma is a rare benign bone tumor that occurs mostly in the jaw, but also affects paranasal sinuses and fronto-ethmoidal complex. Occipital bone is an extremely rare location for these tumors; only two cases have been reported.
  
  
  METHODS
  We present the first case reported as psammomatoid subtype of ossifying fibroma, according to the 2005 WHO classification. An 18 years old male patient with infratentorial tumor, in the occipital bone, that produces mass effect over the cerebellum.
  
  
  CONCLUSIONS
  This case may provide a guide to consider these lesions for a more rapid and precise diagnostic in future cases.
authors.affiliation: Department of Neurosurgery, Puerta de Hierro University Hospital, Manuel de Falla Street, N° 1, Majadahonda, 28222 Madrid, Spain ; Oporto N° 1, Portal 3, Floor 1, Apartment A, Pozuelo de Alarcon, PC, 28224 Madrid, Spain.
authors.forename: Carlos
authors.identifier: 0000-0002-5130-2370
authors.initials: C
authors.lastname: Cotúa Quintero
authors.affiliation: Department of Neurosurgery, Puerta de Hierro University Hospital, Manuel de Falla Street, N° 1, Majadahonda, 28222 Madrid, Spain.
authors.forename: Anwar
authors.initials: A
authors.lastname: Saab Mazzei
authors.affiliation: Department of Neurosurgery, Puerta de Hierro University Hospital, Manuel de Falla Street, N° 1, Majadahonda, 28222 Madrid, Spain.
authors.forename: Juan
authors.initials: J
authors.lastname: Revuelta Barbero
authors.affiliation: Department of Neurosurgery, Ramon and Cajal University Hospital, Colmenar Viejo Street, Km. 9,100, 28034 Madrid, Spain.
authors.forename: Avelino
authors.initials: A
authors.lastname: Parajon Diaz
authors.affiliation: Department of Neurosurgery, Ramon and Cajal University Hospital, Colmenar Viejo Street, Km. 9,100, 28034 Madrid, Spain.
authors.forename: Luis
authors.initials: L
authors.lastname: Ley Urzaiz
keywords: Fibroma; Occipital; Ossifying; Psammoma; Tumor