In the present study, we aimed to elucidate whether copy number changes in seven genes (EGFR, FGFR1, GATA6, HER2, IGF2, MYC, and SETDB1) are related to the survival of patients with advanced GC and might serve to detect a subset of GC cases with poor prognosis. The gene discussed is ERBB2; the disease is gastric cancer.