Spontaneous dislocation of the atlanto-axial articulation occurring in ankylosing spondylitis and rheumatoid arthritis

Abstract

Summary

• 1.

  A review of published cases of atlanto-axial dislocation in ankylosing spondylitis and rheumatoid arthritis is given.

• 2.

  The aetiology of spontaneous atlanto-axial dislocation is discussed.

• 3.

  A description is given of 2 cases of ankylosing spondylitis and 1 case of rheumatoid arthritis complicated by atlanto-axial dislocation.

• 4.

  Commentary is made on these cases emphasizing the importance of being aware that atlanto-axial dislocation can complicate ankylosing spondylitis and rheumatoid arthritis and that dislocation can occur at any time if the disease is active.