PDCD1 and neoplasm: The mean CD8+, FOXP3+, and PD‐1+ TAIC densities were significantly higher in the tumor epithelium than in the tumor stroma and non‐tumor stroma compartments (Figure 4A, n = 89, p = 0.00, p = 0.016, p = 0.00, respectively; Kruskal–Wallis with pairwise Wilcoxon rank sum comparisons).