CEACAM5 and colorectal carcinoma: In fact, it has been reported that approximately 73% of CRC patients who underwent surgery had normal preoperative serum CEA levels38 and 84% had normal CA19‐9 levels.39 On the other hand, GAR is based on protein components and NLR is based on cell components, and they are less likely to reflect tumor characteristics as both are indicators of inflammation and immune status in individual patients.