Figure 4From: Atlantoaxial subluxation as an early manifestation in an adolescent with undifferentiated spondyloarthritis: a case report and review of the literature A) Lateral cervical spine X-ray with flexion view at three months after surgery shows no abnormal movement between C1 and C2 vertebrae. B) Lateral cervical spine X-ray with extension view at three months after surgery shows no abnormal movement between C1 and C2 vertebrae.Back to article page