title: Unusual radiographic appearance of ossifying fibroma in the left mandibular angle.
abstract: Ossifying fibroma is usually a unilocular lesion with a well-defined, thinly corticated margin radiographically, although various patterns have been noted. The patient was a 27-year-old woman with a painless radiolucent lesion demonstrated on panoramic radiography to involve the root-apex area of the left lower second and third molars. Radiographically, the lesion had some features of a benign tumour, such as an odontogenic myxoma. However, the deep invaginations towards the interalveolar septa suggested a simple bone cyst, whereas the irregular margin and lack of expansion or mandibular canal displacement were consistent with a malignant lesion. A hard tissue component was confirmed only by soft-tissue mode CT. Although this lesion was histopathologically diagnosed as ossifying fibroma, the conflicting imaging findings were challenging and very intriguing.
authors.affiliation: Department of Oral and Maxillofacial Radiology, Dental Research Centre, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan. araki-m@dent.nihon-u.ac.jp
authors.forename: M
authors.initials: M
authors.lastname: Araki
authors.forename: K
authors.initials: K
authors.lastname: Matsumoto
authors.forename: N
authors.initials: N
authors.lastname: Matsumoto
authors.forename: K
authors.initials: K
authors.lastname: Honda
authors.forename: H
authors.initials: H
authors.lastname: Ohki
authors.forename: K
authors.initials: K
authors.lastname: Komiyama
mesh_terms: D000328:Adult; D001706:Biopsy; D003094:Collagen; D003937:Diagnosis, Differential; D005260:Female; D018214:Fibroma, Ossifying / Q000000981:diagnostic imaging*; D006801:Humans; D007570:Jaw Cysts / Q000000981:diagnostic imaging; D008339:Mandibular Neoplasms / Q000000981:diagnostic imaging*; D008963:Molar / Q000000981:diagnostic imaging; D008964:Molar, Third / Q000000981:diagnostic imaging; D009808:Odontogenic Tumors / Q000000981:diagnostic imaging; D010006:Osteoblasts / Q000473:pathology; D011862:Radiography, Panoramic; D014057:Tomography, X-Ray Computed; D019227:Tooth Apex / Q000000981:diagnostic imaging
chemical_list: D003094:Collagen