I was also diagnosed with a Celiac Artery Aneurysm in May... I had my left kidney removed in 17 and then a surgical hernia repair this past October.. My CT scan BEFORE the hernia repair showed nothing.. This may when I had a follow-up CT scan showed a 1.6CM celiac aneurysm... Came out of nowhere. I have no symptoms either.. What I find odd though is the difference in the size of what Dr.'s consider a time to intervene.. That is the most distressing part to me.. My Dr. told me that 1.6CM is to small and he wouldn't suggest I do anything.. So at this point we will monitor with biannual CT scans and I go and live my life... I ain't gonna worry about it.. BTW I am 64 and WAS a smoker..