It is very unsettling and difficult to not think about. I live in B.C. and my surgery was at St. Paul's Hospital in Vancouver, B.C. – I live on Vancouver Island. Sadly, the Mayo Clinic is not an option for me unless I win a lottery. There is a 2016 study out of Virginia that says KD's should 'be called Kommerellis Aneurysm and not Kommerellis Diverticulum because of their unpredictability and catastrophic nature' and it goes on to explain why. My surgeon called it an aneurysm but my cardiologist now feels as your does that it shouldn't be under the aneurysm umbrella, that they are unlikely to rupture or rare to rupture but considering what we have is very rare, it seems par for the course. I hope this isn't too much negative stuff and I apologize if so.