Since tumor patients have both inflammatory infections and immune disorders after surgery, and CRP and lymphocyte levels precisely also reflect well the inflammatory infections and immune status of patients after surgery, a series of studies on colorectal cancer patients in recent years have defined the ratio of lymphocytes to CRP as a new index and reported the correlation between LCR and prognosis of colorectal cancer (20–29). This evidence concerns the gene CRP and colorectal cancer.