Figure 1:

Computed tomography angiography examination. (a and b) Sagittal multiplanar reconstruction showing the left internal carotid artery (ICA) dissection with severe vessel stenosis (arrowheads). The close proximity between C1 transverse process and the posterior aspect of the dissected vessel is shown (red arrows). (c) Oblique volume rendering technique reconstruction technique depicts an unusual ICA compression by styloid process anteriorly (white arrow) and C1 transverse process posteriorly (red arrow).