Development and Clinical Validation of Ketogen-based Therapeutic Diet for Pancreaticobiliary Cancer Patients

Decreased bowel function and loss of appetite in patients who underwent pancreaticobiliary surgery contribute impaired nutritional status in postoperative period. It can also affect perioperative and oncologic outcomes negatively. Therefore it is important to improve nutritional status in postoperative period by supply tailor-made optimal diets. The investigators have developed customized postoperative diets for pancreaticobiliary cancer patients. The investigators expect that customized diets for pancreaticobiliary patients will increase the food intake rate and contribute a improvement of perioperative outcomes and even oncologic outcomes.

Inclusion Criteria:

• Adult (age more than 19)
• Pancreaticobiliary cancer patient who is scheduled pancreaticoduodenectomy or distal pancreatectomy
• Pancreatic cancer / Duodenal cancer / Distal bile duct cancer / Ampulla of Vater cancer

Exclusion Criteria:

• Patient who denied clinical trial
• Diabetes Mellitus(DM) patient with DM complication
• Hyperlipidemia patient with vascular co-morbidity
• Impaired renal function or renal failure (GFP<90%)