Figure 1.

Plain lateral radiographs (a) and sagittal computed tomography (b) of the cervical spine revealing congenital bony canal stenosis at the CVJ caused by the C1 posterior arch and occipital bone

Plain lateral radiographs (a) and sagittal computed tomography (b) of the cervical spine revealing congenital bony canal stenosis at the CVJ caused by the C1 posterior arch and occipital bone