It showed that six cases of GKN2 protein-positive expression include three cases of TFF1-positive expression in gastric cancer specimens, while 71 cases of TFF1-negative expression exist concurrently with 68 cases of GKN2-negative expression, namely, TFF1 protein expression loss is related to GKN2 protein expression loss as given in Table 3. Here, GKN2 is linked to gastric cancer.