title: Etiology of child acute stiff neck.
abstract: METHODS
  The results of MRI study of 10 children with acute stiff-neck who were treated in the Department of Spine Surgery in Saint-Petersburg State Pediatric Medical Academy.
  
  
  OBJECTIVE
  To demonstrate the MRI findings in children with acute stiff neck and suggest other explanations to this findings.
  
  
  BACKGROUND
  The etiology of child's acute stiff-neck has been debated in the published data. Most authors supported the basic role of atlantoaxial fixation in this condition. But modern investigations using MRI and CT show another explanations.
  
  
  METHODS
  A total of 10 patients aged 5 to 14 years with typical stiff neck with acute onset were studied by MRI in first 12 hours.
  
  
  RESULTS
  In all 10 investigations typical changes that disappeared in a few days were found. There were triangle or oblong high intensity zone near the external edges of backbone discs C2-C3 or C3-C4. The zones were always on the side where the patients felt pain.
  
  
  CONCLUSIONS
  In our opinion, the main reason of the child's acute stiff-neck is a rapid or gradual strangulation of the vascularized tissue in uncovertebral zones in C2-C3, C3-C4 caused by a head movement or a neck's prolonged incurvationed position during a profound sleep. It causes a "wedge" of hydropic tissues that irritate the back longitudinal ligaments. As the result, a head has antalgic position and, in the most severe cases, is blocked.
authors.affiliation: Department of Children Spine Surgery, State Pediatric Medical Academy, Saint-Petersburg, Russia.
authors.forename: Alexander V
authors.initials: AV
authors.lastname: Gubin
authors.forename: Edward V
authors.initials: EV
authors.lastname: Ulrich
authors.forename: Aleksey I
authors.initials: AI
authors.lastname: Taschilkin
authors.forename: Anatoly N
authors.initials: AN
authors.lastname: Yalfimov
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D002574:Cervical Vertebrae / Q000000981:diagnostic imaging / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D006801:Humans; D007403:Intervertebral Disc / Q000000981:diagnostic imaging / Q000473:pathology; D008279:Magnetic Resonance Imaging / Q000379:methods*; D019547:Neck Pain / Q000175:diagnosis* / Q000209:etiology*; D011859:Radiography; D012307:Risk Factors; D013122:Spinal Diseases / Q000150:complications