High S100A9 cell count in cancer tissue indicates better outcome in gastric cancer patients. (A) Scatter plot of S100A9-positive inflammatory cell count in each pathological TNM stage. The blue line indicates the level of 200. (B) ROC curve of S100A9 cell count for the prediction of pathological TNM stage. Arrow indicated the cutoff point about 200. (C) Kaplan-Meier analysis of overall survival for each pathological TNM stage. (D) Kaplan-Meier analysis of overall survival for high S100A9 cell count (≥ 200) group and low S100A9 cell count (< 200) group. (Only 176 patients were enrolled in the analysis for one patient lost to follow-up).