Figure 1.

This is a 56-year-old patient with rheumatoid arthritis who presented with subaxial pain and myelopathy. Computed tomography sagittal reconstructions show (a) atlanto-axial dislocation (b) decompression of the craniovertebral junction in the midline and instrumentation and fusion from the occiput the midcervical spine. No any instability was demonstrated by dynamic flexion (1c) and extention X-rays (1d) after the postoperatuar period (15 mo). Fusion was demonstrated by CT [Figure 1e]