PDPN and cancer: PDPN expression was significantly downregulated in 14 cancers (ACC, BLCA, BRCA, CESC, KICH, KIRC, LUAD, OV, PCPG, PRAD, SKCM, THCA, UCEC, UCS), and significantly upregulated in 13 cancers (CHOL, COAD, DLBC, ESCA, GBM, HNSC, LAML, LGG, PAAD, READ, STAD, TGCT, THYM).