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Cervical spine in JRA


  • involvement can lead to kyphosis, facet ankylosis, & atlantoaxial subluxation;
  • the majority of patients w/ polyarticular JRA may show C-spine involvement;


  • anterior erosion of the odontoid process;
  • anterior posterior erosion of odontoid process;
  • subluxation of C1 on C2;
  • focal soft tissue calcification anterior to the ring of C1
  • ankylosis of apophyseal joints (often leading to ankylosis & fusion of vertebrals bodies);
  • longitudinal and circumferential growth abnormalities of adjacent vertebral bodies following spontaneous posterior fusions
  • subaxial subluxations between C2 and C7 (often associated w/ ankylosis of facet joints above and below the area of subluxations)