Fig. 1
From: Upper cervical epidural abscess with emphasis on diabetes as a risk factor: a case report
shows CT images of the cervical spine, which are ideal to visualise bones, assess for atlantoaxial joint (AAJ) stability, and plan for operative fixation when needed. Figure 1a is a midline sagittal view of the cervical spine showing bony erosions (arrow) of the dens secondary to osteomyelitis. Also, the anterior atlantodental interval (ADI) is shown to be greater than 2 mm (0.35 cm), which is a sign of AAJ instability. Figure 1b is a coronal view of the cervical spine through the dens. It shows significant asymmetry between the right (0.73 cm), and left (0.18 cm) lateral ADI, which is another sign of AAJ instability