MAGEA3 and gastric cancer: As shown in Figure 11A, serum concentration of MAGEA3 antibodies in the GC group (1.049 ± 0.384) was significantly higher than that of patients with chronic gastritis (0.546 ± 0.278) and healthy controls (0.412 ± 0.218) (F1 = 15.096, p < 0.01; F2 = 34.373, p < 0.01).