The following common risk variables were observed to significantly affect patient survival at one-, three-, and five-year intervals in GC patients after radical surgery and immunotherapy: advanced age; carbohydrate antigen 72-4 (CA72-4) level; carbohydrate antigen 125 (CA125); carcinoembryonic antigen (CEA) level; tumor lymph node metastases; tumor invasion; multiple tumors; tumor peripheral nerve invasion (PNI); tumor size; and H. pylori infection [60]. Here, CEACAM5 is linked to gastric cancer.