Hello, ginnym3! I went to debulking surgery for a large pancreatic tumour (20×16 cm) with liver metastases, combined with total hysterectomy due to endometrial cancer (unrelated, not NET). 9 hrs surgery, 1 week in the hospital.
My advice - you have to go to surgery as physically fit as possible! ( makes recovery faster). I asked the surgeon about the worse case scenario - feeding tube, colostomy bag ( luckily I escaped all of that). Due to the size of my tumour and metastases plus hysterectomy it can only be done with open surgery ( not by laparoscopy). Ask if you will be on medications ( like Lanreotide) which can damage the gallbladder, so it needs to be removed also. I have my spleen removed which requires additional vaccines. If you have specific questions - ask me! Good luck, you can do this!!