As expected, the proportion of CK19 + ID3 + tumor cells positively correlated with the proportion of CK19-PDGFRβ + cells (r = 0.46, P < 0.001), while the proportion of CK19 + ID3- tumor cells negatively correlated with the proportion of CK19-PDGFRβ + cells (r = −0.46, P < 0.001) (Fig. 6d). This evidence concerns the gene KRT19 and neoplasm.