Tumor-associated inflammation is closely related to the development of tumors. The ratio of lymphocytes to C-reactive protein （LCR） is a new marker reflecting the inflammatory state of the body， which plays an important role in predicting the prognosis of digestive system neoplasms. Compared with the detection of lymphocytes or C-reactive protein alone， this marker has higher sensitivity and accuracy， and can provide a new direction for clinical diagnosis and treatment of digestive system neoplasms.