Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Comparison of bony carotid canals with ICA hypoplasia and near-occlusion. A, A case of right ICA hypoplasia. A narrow bony carotid canal (white arrow)—smaller than that on the contralateral side. Reprinted with permission from Ibrahim et al.58 B, A case of left near-occlusion with full collapse. The narrow left ICA (black arrow) is in a normal-sized bone channel—“a small brook in a large river bed.” Bone channels are similar on the left (black arrow) and right (black arrowhead).
