Our analyses revealed that PDPN-expressing cells did not coexpress the breast-tumor–associated fibroblast marker αSMA but predominantly coexpressed the LEC-associated marker VEGFR3 (S7C Fig) and weakly coexpressed or failed to coexpress the vascular marker CD31 (S7D Fig), consistent with previous observations [19]. The gene discussed is ACTA1; the disease is breast neoplasm.