We found an increased efficacy of AZD1775 in reducing cell proliferation in MUC‐1 silenced for FLNA (−84.8(8.0%) for FLNA siRNA vs −71.9(6.4%) for C‐ siRNA, p < 0.01 at 250 nM) (Figure 6A), and similar results were obtained in one patient‐derived primary cultured ACC cells (Figure 6B). This evidence concerns the gene MUC1 and adrenal cortex carcinoma.