John enhanced this picture by surrounding the aneurysm with a thin black line so you can see it in contrast to all the other stuff.
Also note that this view only shows the top side of the problem. The whole thing wraps around the bottom of the cerebral artery so you can’t see the whole 8mm aneurysm from here.
Part of the wall was so thin that the doc could see the blood circulating inside of it. No doubt that it would have ruptured soon.
