title: Fracture of the dens in ankylosing spondylitis.
mesh_terms: D001368:Axis, Cervical Vertebra / Q000293:injuries*; D050723:Fractures, Bone / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D009809:Odontoid Process / Q000000981:diagnostic imaging / Q000293:injuries*; D011859:Radiography; D013167:Spondylitis, Ankylosing / Q000150:complications*; D014143:Traction