胰腺癌是恶性程度很高的消耗性疾病。80％～90％的胰腺癌患者在疾病初期即有消瘦、乏力、体重丢失。肿瘤晚期伴随 恶液质，可出现电解质紊乱、低蛋白血症和血糖变化。对胰腺癌患者需要进行常规营养筛查及评估，积极给予营养治疗。胰腺癌营 养治疗途径的选择原则：① 有营养不良且胃肠道功能正常或基本正常的胰腺癌患者，首选肠内营养。②术后可依据加速康复外科 理念给予营养治疗，帮助患者进入下一阶段治疗。③接受放化疗且生命体征平稳，并能自主进食的胰腺癌患者，推荐营养治疗；生命 体征不稳和多器官功能衰竭者，原则上不考虑系统性营养治疗。④有梗阻者，不能经口进食的胰腺癌患者需肠外营养。

Pancreatic cancer is a highly malignant wasting disease, 80％- 90％of pancreatic cancer patients experience emaciation, fatigue, and weight loss in the early stages of the disease. Advanced neoplasms are associated with poor fluid mass and may present with electrolyte disturbances, hypoproteinemia, and changes in blood glucose. Patients with pancreatic cancer need routine nutritional screening and evaluation, and actively give nutritional treatments. Principles of nutritional therapy for pancreatic cancer: ① Enteral nutrition is the first choice for patients with malnutrition and normal gastrointestinal function.②Postoperative nutrition treatment can be given according to the concept of accelerated rehabilitation surgery to help patients enter the next stage of treatment.③ Nutritional therapy is recommended for pancreatic cancer patients with stable vital signs and autonomic eating disorder who have received radiotherapy and chemotherapy. In principle, systemic nutritional therapy should not be considered for patients with unstable vital signs and multiple organ failure.④ Patients with obstruction and pancreatic cancer who cannot eat orally need parenteral nutrition.