Figure 2:Midline sagittal magnetic resonance images from two dogs with thoracic hemivertebrae. The left image demonstrates spinal cord stretch and thinning (or tethering), but with a wide dorsal epidural space. On the right there is direct spinal cord compression due to vertebral canal stenosis.
Figure 3:Midline sagittal MR image showing an intervertebral disc extrusion, with spinal cord compression in a 6 year old French Bulldog at the site of a hemivertebrae.
Figure 4:In the left and middle images, an arachnoid diverticulum (small arrows as the enlarged dorsal subarachnoid space) has developed at a hemivertebrae, with spinal cord damage (large arrows). In the right image, an area of syringomyelia has developed at a hemivertebrae (arrow), but without any arachnoid diverticulum.
Figure 5:Pre-surgery radiographs (top) and post-surgery radiographs (bottom) showing the corrected curvature of the spine at the hemivertebra using a locking plate and bone graft.