I had a distal pancreatectomy and splenectomy in May 2023 at MGH Boston. I had laparoscopic/robotic surgery which I'm assuming you're able to have at the Mayo. I was uncomfortable for the first 24 hours. I was able to eat the next morning and did some walking. I was advised prior to surgery that I could be in hospital for up to 72 hours however I was discharged in 48 hours. Pain was maybe a 5 -6 the first 24 hours and reduced to a 3-4 at discharge. Tylenol was enough to ease the discomfort once I was home. Getting up and walking helps and is highly recommended. It sounds like they know you have a neuroendocrine tumor which is good. They were not able to definitively diagnose my tumor prior to surgery as they could not get a good biopsy. The decision was made to go forward with the surgery and remove the tumor. Unfortunately in my case it turned out to be Stage 3 adenocarcinoma. One month after surgery I started on 12 rounds of chemo followed by six weeks of chemo radiation. The good news is that 2 1/2 years later I'm still cancer free. The surgery has had no impact on my lifestyle, diet or ability to perform activities. I am a fairly active 72 year old. I thank God every day for good medical care and good fortune. Best of luck with your surgery.