title: Cementomas. II. Aggressive cemento-ossifying fibroma of the ethmoid region.
abstract: Aggressive cemento-ossifying fibroma is the most aggressive tumor of all cementum-containing neoplasms. An extensive, destructive cemento-ossifying fibroma of the ethmoid region was found in a patient. To our knowledge, this is the first case of a cemento-ossifying fibroma in this location. A radical maxillectomy was ultimately required to control the tumor, preserving orbital contents. The unique site of origin is thought to be the result of an ectopic periodontal membrane or of  a primitive mesenchymal cell rest.
mesh_terms: D000328:Adult; D001859:Bone Neoplasms / Q000473:pathology / Q000601:surgery*; D002485:Cementoma / Q000473:pathology / Q000601:surgery*; D005004:Ethmoid Bone / Q000473:pathology / Q000601:surgery; D005153:Facial Neoplasms / Q000473:pathology / Q000601:surgery*; D005260:Female; D006801:Humans; D009808:Odontogenic Tumors / Q000601:surgery*