In Cohort 3 (HKI2), stromal FAP expression was higher in metastatic versus non‐metastatic cancers (Mann–Whitney U test, p = 0.01; Figure 5A), but epithelial FAP and stromal αSMA were not statistically different between metastatic and non‐metastatic cancers (p = 0.05 and p = 0.19, respectively; Figure 5B, C). This evidence concerns the gene ACTA1 and cancer.