ACTA1 and neoplasm: Kaplan–Meier survival analysis in MRI‐visible tumours showed that high stromal and epithelial FAP were associated with shorter BCR‐free survival (log‐rank test, p = 0.02 and p = 0.01, respectively), whereas high stromal αSMA was associated with longer BCR‐free survival (p = 0.02; Figure 3D–F).