Studies have shown that BCL2‐associated athanogene 1, melanoma‐associated antigen‐A1, MAGE‐A3, melanoma‐associated antigen‐C2, SSX family member 2, and SSX family member 4 genes are several representative genes that are specifically and highly expressed in stomach cancer.19, 25, 26. Here, SSX4 is linked to gastric cancer.