Dilation of both carotids for over 12 years. doc says might be clot, and wants me to have carotid ultrasound. does this make sense?

Need more info: What is meant by "dilation?" Is this something the Dr feels? Sees? seen on a test? Clot is a poor explanation for a dilated artery in any event. Carotid aneurysms (dilated carotid arteries are VERY RARE at 24 yr of age. Carotid ultrasound is a good first test to look at Carotid arteries, but there should be a good reason to do it and I'm not sure I see one in this case. Hope this helps.