FIG 4. Marked thickening of left common carotid wall in a 35-year-old woman with arteritis.

A, First-pass (coronal) 3D contrast-enhanced MR angiography shows occlusion of the left common carotid artery (arrow) and the left subclavian artery. The right common and internal carotid arteries are dilated.

B, Source image of second-phase (axial) MR angiography shows marked thickening and enhancement of the wall of the common carotid artery (arrows).

FIG 5. Source image of second-phase (axial) MR angiography shows invasion of the left internal carotid artery by nasopharyngeal carcinoma (arrow)