Compared to BCBM samples, the expression intensity of PDGFR-β and α-SMA was relatively high in the primary tumor samples without statistical significance (p = 0.177 and 0.132, respectively), and the concordance was low (kappa value = 0.170 and 0.148, respectively) (Supplementary Tables 1–2). The gene discussed is ACTA1; the disease is neoplasm.