PDPN and neoplasm: POSTN was present both at the invasive margin and in the centre of the tumours (juxta‐tumoural stroma [<100 μm] and pan‐stroma 23), as previously reported 24, while MYH11 and PDPN were found only in the centre (juxta‐tumoural stroma and pan‐stroma) (Figure 2E).