Cancer treatment, Gastrectomy, Hepatic artery infusion pump chemotherapy, Whipple procedure, Pancreatectomy, Laparoscop...ic surgery, Splenectomy, Cholecystectomy, Abdominal surgery, Hyperthermic intraperitoneal chemotherapy, Cytoreductive surgery, Microwave ablation for cancer, Robotic surgery, Rectal cancer surgery, Chemotherapy for colon cancer, Intraoperative radiation therapy, Pancreatic enucleation, Liver resection, Minimally invasive pancreas surgery, Minimally invasive liver surgery, Minimally invasive cancer surgery , Liver tumor, Stage 4 colorectal cancer, Sarcoma, Gastrointestinal stromal tumor, Liposarcoma, Retroperitoneal sarcoma