CLDN2 and neoplasm: As shown in Figure 2H, I, the average weight of mouse tumours at the time of sacrifice was heavier in mice injected with CLDN2‐overexpressing HCT116 compared to mice injected with vector control (0.76 ± 0.14 g, n = 8 vs. 0.42 ± 0.04 g, n = 8, p = .038).