消化道癌症病人因腸胃道腫瘤及其治療，使腸胃道功能不良，營養素吸收受阻，進而產生營養不良；營養不良會降低治療耐受性及生活品質，增加消化道癌症病人死亡率。本文透過文獻查證，統整消化道癌症病人營養不良相關因素、評估工具及營養不良的處置及照護。臨床照護中醫療照護人員宜盡早評估營養狀態，提供個別性營養照護，可提升治療效益及延長存活，本文期能提供護理人員臨床照護參考。

The gastrointestinal dysfunction and nutrient malabsorption associated with gastrointestinal tumors and related treatments may result in malnutrition in gastrointestinal (GI) cancer patients. Malnutrition has been associated with decreased treatment tolerance, poor quality of life, and increased mortality in this patient population. In this article, the relevant literature is reviewed and the factors, assessment tools, and management strategies related to malnutrition are summarized. In clinical care, healthcare providers should conduct early assessments of nutritional status and provide individualization nutritional counselling to promote treatment that effectively prolongs patient survival. This article may be used by nurses as a reference in caring for GI cancer patients.