Representative staining for immunohistochemistry of infiltrating macrophages.

<p>High and low density of CD68+ (tumor-associated macrophages, TAM) (A) and CD206+ (M2 subtype of TAM) cells (B). Magnification in the high infiltration area is shown on the right panel for each staining (top). C and D. Kaplan-Meier analysis of the ratio of infiltrating intraepithelial CD206+/CD68+ cells representing the relative density of CD206+ M2 TAM over the total density of CD68+ intraepithelial infiltrating macrophages. Kaplan-Meier curves of overall survival (C) and disease-free survival (D) in 180 and 174 patients, respectively. Significance (p) is indicated by log rank.