Where is the predominant abnormality or diagnostic pointer?
Pannus formation is seen around odontoid process, with increased atlanto-axial distance
Which part of the spine, is most commonly involved in this disease?
Cervical spine is most commonly involved in rheumatoid arthritis
An irregular 'pannus' appearing isointense on T1W and hyperintense on T2W images is seen, with increased atlantoaxial distance.