heya shar, i have no idea if they are the same. there's just more research on these kind of stenoses and how they form.
here is a neat carotid stenosis graphic:
another image (don't know if it likes png extensions but i'll try anyway):
this is possibly the lamest web site i've ever seen but at least they have this image..
who's got a good shot of a jugular or azygous stenosis? google image is not my friend in this case
i'd like to know what the difference(s) between these stenoses and other stenoses are, for sure.
as far as the carotid example goes, my understanding of why cholesterol etc builds up on artery walls in atherosclerosis, is at least in some part, a protective response to an injury of some kind to the wall itself, such as in high blood pressure. that's all i got for now