Western blotting (WB) analysis across thyroid cancer cell lines showed that PDCD4 expression was markedly reduced or absent in ATC cell lines (BHT101, ACT1, 8305C, BPC (mouse‐derived) compared to DTC cell lines (TPC‐1, B‐CPAP, K1, KTC‐1) (Figure 5G; Figure S11A, Supporting Information). This evidence concerns the gene PDCD4 and thyroid cancer.