case_images: PMC10870096_01
case_images: A hand X-ray showing several bone erosions in the affected joints (white arrows)
case_images: cureus-0016-00000052579-i01.jpg
case_images: PMC10870096_01_cureus-0016-00000052579-i01.jpg
case_images: FIG1
case_images: A hand X-ray showed bone erosions in the affected joints (Figure 1).
case_images: MRI of high signal areas of dens, showing the inflammation of the dens axis (white arrows). (A) T2 enhanced; (B) short-tau inversion recovery
case_images: cureus-0016-00000052579-i02.jpg
case_images: PMC10870096_01_cureus-0016-00000052579-i02.jpg
case_images: FIG2
case_images: Deteriorating neck and arm pain led to an MRI, which showed inflammation of the dens axis and a positive instability test of the atlantoaxial joint, indicative of atlantoaxial subluxation secondary to RA (Figure 2).