What are the forms of spinal involvement in rheumatoid arthritis (RA)?

Updated: Nov 01, 2018
  • Author: Michele Calleja, MD, FRCR, MRCP; Chief Editor: Felix S Chew, MD, MBA, MEd  more...
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Clinically, cervical spine involvement in RA patients is reported to be mainly seen in 3 forms: atlantoaxial subluxation (AAS) (65%), superior odontoid migration (SOM) (20%), and subaxial subluxation (SAS) (15%). [3]  In cases of AAS, anterior subluxation may be most common (70%), followed by lateral subluxation (20%). Posterior subluxation is seen  in 7% of cases, and rotational subluxation is very rarely reported. [4]

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