title: Giant cemento-ossifying fibroma of the maxilla.
abstract: BACKGROUND
  Fibro-osseous lesions of the skull and facial bones are benign tumors, but they can be mistaken for malignant tumors due to their clinically aggressive behavior. Cemento-ossifying fibroma (COF) is a benign fibro-osseous lesion characterized by slow growth and fibrous and calcified tissue content. COFs are locally destructive lesions causing deformities in the bones. The recurrence risk is high if they are not completely removed.
  
  
  METHODS
  In this case report we describe a giant COF mimicking chondrosarcoma in the oral cavity of a 55-year-old woman causing significant facial deformity and feeding problems.
  
  
  CONCLUSIONS
  Giant COF occurs rarely in the jaws and given that this lesion has similar imaging and clinical features to several other tumors, the diagnosis is always a challenge for clinicians, radiologists and pathologists.
authors.affiliation: Department of Otorhinolaryngology, Hitit University, Çorum - Turkey.|ENT Clinic, Ankara Numune Education and Research Hospital, Ankara - Turkey.
authors.forename: Adnan
authors.initials: A
authors.lastname: Unal
authors.affiliation: ENT Clinic, Ankara Numune Education and Research Hospital, Ankara - Turkey.
authors.forename: Nurcan
authors.initials: N
authors.lastname: Yurtsever Kum
authors.affiliation: ENT Clinic, Ankara Numune Education and Research Hospital, Ankara - Turkey.
authors.forename: Rauf Oguzhan
authors.initials: RO
authors.lastname: Kum
authors.affiliation: Radiology Clinic, Ankara Numune Education and Research Hospital, Ankara - Turkey.
authors.forename: Aysun
authors.initials: A
authors.lastname: Erdogan
authors.affiliation: Radiology Clinic, Ankara Numune Education and Research Hospital, Ankara - Turkey.
authors.forename: Deniz Sozmen
authors.initials: DS
authors.lastname: Ciliz
authors.affiliation: Pathology Clinic, Ankara Numune Education and Research Hospital, Ankara - Turkey.
authors.forename: Servet
authors.initials: S
authors.lastname: Guresci
authors.affiliation: ENT Clinic, Ankara Numune Education and Research Hospital, Ankara - Turkey.
authors.forename: Muge
authors.initials: M
authors.lastname: Ozcan
mesh_terms: D002813:Chondrosarcoma / Q000175:diagnosis; D003937:Diagnosis, Differential; D005260:Female; D018214:Fibroma, Ossifying / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D005354:Fibrosarcoma / Q000175:diagnosis; D006801:Humans; D008279:Magnetic Resonance Imaging; D008339:Mandibular Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D008437:Maxilla / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D008875:Middle Aged; D009807:Odontogenic Cysts / Q000175:diagnosis; D012516:Osteosarcoma / Q000175:diagnosis; D010509:Periodontal Cyst / Q000175:diagnosis; D014057:Tomography, X-Ray Computed