POSTN and neoplasm: The results of ST also indicate that the marker genes of c01_CST1 subset, such as POSTN and FAP, are mainly expressed in the tumor side of the leading‐edge area, and so did the signature of this subset, which is composed of highly expressed genes calculated by FindAllMarkers algorithm, while the myofibroblast (c03_MYH11) subsets are mainly distributed in the non‐tumor side (Figure 6D).