In addition, we used Nthy‐ori‐3.1 thyroid cells (BRAF WT) as controls and treated them with STS at different concentrations, and found that the protein levels of BRAF remained unchanged (Figure 1C).These results suggest that BRAF V600E may play an important role in STS‐induced cell death of papillary and anaplastic thyroid cancer cells. This evidence concerns the gene BRAF and thyroid gland undifferentiated (anaplastic) carcinoma.