My dad has had one for about 3 years now. He had an ultrasound in Aug. 2004 and one just last week. Dr's office called with one of those "Call us back" messages that you read so much into (this office tends to NOT call if all is fine)...just wondering what other experiences have been as far as time from diagnosis/size of aneurysm, to the point of needing surgery. His last measurement was about 3 cm...usually at 5 they want to operate.