title: CPPD crystal deposition disease of the cervical spine: a common cause of acute neck pain encountered in the neurology department.
abstract: BACKGROUND
  Calcium pyrophosphate dihydrate (CPPD) crystal deposition disease is one of the most common forms of crystal-associated arthropathy in the elderly. However, CPPD deposition on the cervical spine is less well known, and only a limited number of cases have been reported to date. Here, we report our recent clinical experience with CPPD crystal deposition disease of the cervical spine and describe the clinical features of this disease.
  
  
  METHODS
  Fourteen patients with clinically diagnosed CPPD crystal deposition disease of the cervical spine at our department during the period from January 2005 to December 2008 were analyzed retrospectively.
  
  
  RESULTS
  Patients ranged in age from 54 to 92 (mean+/-SD, 77.5+/-8.5). Chief symptoms of patients were acute posterior neck pain and fever. All patients had markedly restricted neck rotation. Serum CRP level was highly elevated in all patients (10.16+/-5.35 mg/dL). Computed tomography of the cervical spine demonstrated linear calcific deposits in the transverse ligament of atlas (crowned dens syndrome) in all patients. Calcific deposits were also found in other periodontoid structures and the ligamenta flava in some patients. Posterior neck pain, fever, and increased serum inflammatory indicators were relieved within 1 to 3 weeks by nonsteroidal antiinflammatory drugs (NSAIDs) or a combination of NSAIDs and prednisolone. Most of the patients were misdiagnosed as having other diseases before consultation.
  
  
  CONCLUSIONS
  CPPD crystal deposition disease of the cervical spine is one of the most common underrecognized causes of acute neck pain in the neurology department, especially in elderly patients.
authors.affiliation: Department of Medicine (Neurology and Rheumatology), Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto 390-8621, Japan. sekijima@shinshu-u.ac.jp
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Sekijima
authors.forename: Takuhiro
authors.initials: T
authors.lastname: Yoshida
authors.forename: Shu-Ichi
authors.initials: S
authors.lastname: Ikeda
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000893:Anti-Inflammatory Agents / Q000627:therapeutic use; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000627:therapeutic use; D002114:Calcinosis / Q000175:diagnosis / Q000209:etiology / Q000473:pathology*; D002131:Calcium Pyrophosphate / Q000378:metabolism*; D002574:Cervical Vertebrae; D002805:Chondrocalcinosis / Q000150:complications / Q000000981:diagnostic imaging / Q000188:drug therapy; D003460:Crystallization; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D019547:Neck Pain / Q000175:diagnosis / Q000209:etiology / Q000473:pathology*; D011239:Prednisolone / Q000627:therapeutic use; D012189:Retrospective Studies; D013131:Spine / Q000000981:diagnostic imaging / Q000378:metabolism* / Q000473:pathology*; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
chemical_list: D000893:Anti-Inflammatory Agents; D000894:Anti-Inflammatory Agents, Non-Steroidal; D011239:Prednisolone; D002131:Calcium Pyrophosphate