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Radiographic Changes of Cervical Spine in JRA

- anterior erosion of the odontoid process
- anterior posterior erosion of odontoid process (applecore odontoid)
- subluxation of C1 on C2;
- focal soft tissue calcification anterior to the ring of C1
- ankylosis of the apophyseal joints (often leading to ankylosis & fusion of the 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)

Changes in the cervical spine in juvenile rheumatoid arthritis.