I also had a hernia post Whipple surgery. Because it is only an issue when I am upright and CT scans were done while laying down, I don’t think anything was noticed in scan. I first brought it to my dr attention about 2 months after surgery. I throughly it was just because I had started to eat more solids and that was my new normal given the restructuring of my digestive system. I only found out about 2 years later that it was a hernia at the incision site. Apparently it is quite common. That specialist advised me what to watch for - any discomfort, pain, swelling, hardness, fever - (go to emergency) but said otherwise to leave it as there would be so much scar tissue the repair surgery could be a much bigger problem. I hold the area when coughing or straining in any way. So far, so good!