Fig. 6

Correlation between immune cell PD-L1 expression at invasive front and tumor-infiltrating lymphocyte count (A and B). A positive correlation is demonstrated in mismatch-repair-deficient tumors (groups A–C, p < 0.001), but not in mismatch-repair-proficient tumors (groups D and E, respectively). Designations for the groups: A, mismatch-repair-deficient—Lynch syndrome associated; B, mismatch-repair-deficient—unexplained C, mismatch-repair-deficient—MLH1-methylated; D, mismatch-repair-proficient—tumor-infiltrating lymphocyte-high; E, mismatch-repair-proficient—consecutive