Atlantoaxial Subluxation Complicated by Diffuse Idipathic Skeletal Hyperostosis A Case Report

Atlantoaxial subluxation occurs fairly often in rheumatoid arthritis. Rheumatoid arthritis develops in childhood and juvenile ankylosing spondylitis, in which the cervical apophyseal joints become fused, sometimes affects the atlantoaxial joint, with a tendency toward atlantoaxial subluxation.4,6 Reports on the association between atlantoaxial subluxation and ankylosing spinal hyperostosis or ossifying ligamentous disease of the spine are quite rare, although the cervical spine is as fixed in these diseases as in juvenile rheumatoid diseases. A unique case is reported here, in which atlantoaxial subluxation was combined with diffuse idiopathic skeletal hyperostosis(DISH).