Stromal αSMA expression decreased from benign (mean = 0.59, IQR = 0.15) to MRI‐invisible (mean = 0.57, IQR = 0.13) and MRI‐visible (mean = 0.54, IQR = 0.12) tumours (Kruskal–Wallis test, p < 0.001; Figure 3C). Here, ACTA1 is linked to neoplasm.