癌症是当代威胁人类生命的主要病种之一 ,癌症患者的心理问题日益引起重视。有研究认为抑郁是最常见的与免疫异常和免疫疾病有联系的一种心理状态 ,是影响各种疾病临床过程和恢复的重要因素[1] 。本文研究消化系统癌症患者的抑郁情绪对免疫系统的影响 ,为癌症患者的防治和康复 Cancer is one of the major diseases threatening human life in contemporary times. Psychological problems of cancer patients have drawn increasing attention. Some studies have suggested that depression is the most common psychological state associated with immune abnormalities and immune diseases and is an important factor affecting the clinical process and recovery of various diseases [1]. This article studies the effects of depression on the immune system in patients with cancer of the digestive system, and in the prevention and rehabilitation of cancer patients