I agree with what everyone has said, and echo Al's thoughts about how having this is affecting YOU and I really can't see you reaching peace of any sort until you have surgery. It might be part of your personality and why you decided to be a lawyer, the whole argueing both sides of every point and I mean that in a kind way. Other persons could be at peace when their surgeon said wait and put it out of their mind and get on with life, but I know as long as you have this you will be thinking about it and driving yourself nuts with what ifs.
With all that said, the closest article to what you are asking about I know off the top of my head is the Yale article. But the thing is even LOW risk for anything related to this aneuysm is still a risk, somebody will be the person that ruptures at even a low risks, you never know. Kind of like playing russian roulette with 1 bullet in a chamber, has a much lower risk of blowing your brains out than a gun with a full chamber, but would you take that chance? anyway here is the article, I know the bsa article you posted mentioned it, so you might have read it already.
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=2605304 and I'll quote 2 paragraphs from it
"Aortic dissection is one of the most catastrophic acute natural events that can befall a human being. The pain of this disorder is often described by those affected as the most severe pain imaginable, eclipsing that of childbirth and kidney stones. It is interesting that nature perceives the pain of dissection as a “splitting” or “tearing” quality, very much apropos of the pathologic process itself. Because acute aortic dissection often masquerades as a heart attack, its true incidence is often underestimated. If a middle-aged or elderly person arrives in the emergency room with acute onset of chest pain, clutches his chest, and promptly dies, he is likely to be signed out as having experienced a “myocardial infarction.” In actual fact, many such presentations represent undiagnosed aortic dissections.
It takes autopsy series to document the true incidence of acute aortic dissection. Such series have indicated that aortic dissection is actually the most common lethal condition affecting the human aorta, more common than the better-appreciated ruptured abdominal aortic aneurysm