Wow! I also heard of a 4mm close to rupturing. That's why I am happy that the doctors are recommending action. I'm not sure if they noticed a weakening in the artery in the angiogram or what. In my first visit, my doctor said that it is very small, not to worry about it, etc. After my angiogram, he recommended the visit to the doctor who will be performing the surgery, and said to take care of it sooner than later. Personally, I prefer this option because I have felt a bit paranoid with every odd feeling, twitch, blur, and headache. I just want to get it taken care of.