Moreover, both univariate and multivariate analyses indicated that co‐overexpression of the PGAP3 and ERBB2 (**p = 0.004 and *p = 0.046), and T stage (***p < 0.001 and *p = 0.048) were significantly correlated with the prognosis of GC patients, as the independent factors of GC patients (Table 4). Here, ERBB2 is linked to gastric cancer.