- Squiggly red line : approx start of cavernous sinus/cavernous segment
- Dorsal (or inferior) ICA aneurysm -- not quite SHA, too distal, one would expect a SHA aneurysm to be more proximal. SHA aneurysms point medially and inferiorly
- There are some people who believe that more tortuous carotid siphon = increased likelihood of forming ICA aneurysms
- There is also a pericallosal aneurysm -- kind of weird anatomy. There are 2 pericallosal arteries and they come of ACA really late.