title: Jefferson fracture: presentation of a new diagnostic sign.
abstract: A case of a Jefferson fracture is presented. A new diagnostic sign, which is viewed on a lateral radiograph and consists of interposition of the basion between the anterior arch of C-1 and the odontoid process, is described. This sign may aid in the rapid identification of Jefferson fractures.
mesh_terms: D000328:Adult; D001270:Cervical Atlas / Q000000981:diagnostic imaging / Q000293:injuries*; D005260:Female; D050723:Fractures, Bone / Q000000981:diagnostic imaging*; D006801:Humans; D011859:Radiography