title: Cemento-ossifying fibroma of the petromastoid region: case report and review of the literature.
abstract: The cemento-ossifying fibroma (COF) is a mesodermal, non-odontogenic tumour of ectopic multipotential periodontal membrane blast cells. It is aggressive, locally destructive, and has a high recurrence rate. A case report of COF of the petromastoid region is presented. This location has not been described until now. Trauma may act as a trigger to sudden growth of the atopic periodontal tissue. Due to the aggressive behaviour of this tumour and its frequent recurrence radical surgery is needed.
authors.affiliation: Department of Otorhinolaryngology, Head and Neck Surgery, University of Kiel, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Brademann
authors.forename: J A
authors.initials: JA
authors.lastname: Werner
authors.forename: U
authors.initials: U
authors.lastname: Jänig
authors.forename: H M
authors.initials: HM
authors.lastname: Mehdorn
authors.forename: H
authors.initials: H
authors.lastname: Rudert
mesh_terms: D000328:Adult; D001859:Bone Neoplasms / Q000473:pathology*; D018214:Fibroma, Ossifying / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008416:Mastoid; D010579:Petrous Bone; D014057:Tomography, X-Ray Computed