I believe your surgeon’s estimate of dissection risk are quite inflated. I am a scientist and have done a thorough lit review, and my cardiologist at MGH, Eric Isselbacher, is recognized as an expert. We both estimate my risk of dissection ( I’m a 76 yo male with a 4.6 aata) at approximately 1%/yr. In all likelihood, I have a connective tissue disorder given a 1.2 cm (no treatment necessary) celiac aneurysm. Still 1%, not 10%, per year. The excellent surgeon at MGH agreed with that estimate.