The Mann–Whitney U‐test revealed significant intergroup differences in age; maximum tumor size (cm); PNI; the serum levels of albumin (g/dL), CA19‐9 (U/mL), CEA (ng/mL), CRP (mg/dL), and globulin (g/dL); survival period (day); and white blood cell count (×103/mm3). This evidence concerns the gene CEACAM5 and neoplasm.