title: Atlantoaxial rotary subluxation after tympanoplasty.
abstract: OBJECTIVE
  To describe a case of the atlantoaxial rotary subluxation (AARS) after tympanoplasty and discuss its mechanism and management.
  
  
  METHODS
  A 10-year-old boy.
  
  
  METHODS
  Cervical spine plain radiography followed by cervical traction.
  
  
  METHODS
  Range of motion and radiologic follow-up.
  
  
  RESULTS
  The patient showed painful torticollis and rotation and fixation of the head to the right side (cock robin sign). Increased atlantodens interval and asymmetry between facet joints were found on cervical plain radiography. Full functional recovery and reduction of subluxation were achieved by conservative cervical traction.
  
  
  CONCLUSIONS
  Forced surgical positioning of head rotation to the contralateral ear down and restriction during otologic surgery under general anesthesia may complicate AARS, especially in pediatric otologic surgery patients.
authors.affiliation: Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: So Young
authors.initials: SY
authors.lastname: Kim
authors.forename: Jin Woong
authors.initials: JW
authors.lastname: Choi
authors.forename: Byung Yoon
authors.initials: BY
authors.lastname: Choi
authors.forename: Ja-Won
authors.initials: JW
authors.lastname: Koo
mesh_terms: D001268:Atlanto-Axial Joint / Q000000981:diagnostic imaging / Q000293:injuries* / Q000503:physiopathology; D002648:Child; D006801:Humans; D004204:Joint Dislocations / Q000000981:diagnostic imaging / Q000209:etiology* / Q000628:therapy; D008297:Male; D010033:Otitis Media / Q000601:surgery; D011859:Radiography; D016059:Range of Motion, Articular; D014143:Traction; D014433:Tympanoplasty / Q000009:adverse effects*