While, as expected, Ki67 expression was significantly higher in TP53‐mutant tumours compared to those tumours with a wild‐type TP53 gene (p = 0.0024, data not shown), we noted that DDR1 expression was negatively correlated with Ki67 expression in TP53 wild‐type tumours, but not in TP53‐mutant tumours (Figure 4C). This evidence concerns the gene TP53 and neoplasm.