(A) Soluble CD155 levels in sera according to the various cancer types (lung: n = 52, esophageal: n = 8, gastric: n = 49, colorectal: n = 12, bile-duct: n = 25, pancreatic: n = 18, breast: n = 32, ovarian: n = 23, endometrial: n = 16, cervical: n = 15) analyzed by sandwich ELISA. Red bar: mean, black bar: SD. (B) Soluble CD155 levels in sera of gastric cancer patients stratified by disease stage. Stages 1&2: n = 24, stages 3&4: n = 25. (C) Soluble CD155 levels in sera of cancer patients who underwent surgery (n = 73) were analyzed for cancer before and after. Soluble CD155 level significantly decreased after operation. Red plot: mean, preoperative mean: 26.529 ng/mL, postoperative mean: 22.390 ng/mL, P < 0.05. Postoperative days: 69.30 ± 61.95.