Exogenous S100B (0.005‐5 μmol/L) alone, or in the presence of PENVE (0.005‐5 μmol/L), was tested in control biopsies while PENVE (5 μmol/L) was evaluated on control, peritumoral, ulcerative colitis and colon cancer biopsies. Here, S100B is linked to ulcerative colitis.