Supplementary Material for: Clinicopathological Features and Prognostic Significance of HER2 Expression in Gastric Cancer

Background: HER2 positivity is reported to be Methods: A total of 813 gastric cancer patients who underwent HER2 testing between January 2005 and December 2010 were included in this study. Results: Ninety-five (11.7%) patients had HER2-positive gastric cancer. Elevated serum carcinoembryonic antigen (CEA) concentration [odds ratio (OR), 5.629; p Conclusions: Clinicopathological factors may be useful in predicting the HER2 positivity of gastric cancer. Further studies are needed to understand the molecular basis of HER2-positive gastric cancer.