HNRNPC and adrenal cortex carcinoma: Subsequently, LASSO Cox regression analysis was performed to construct an m6A based signature that contained three m6A RNA regulators, including RBM15, HNRNPC, and FTO. We further calculated the risk score for ACC patients as follows: risk score = (0.3070 × expression value of RBM15) + (0.0235 × expression value of HNRNPC) + (-0.0673 × expression value of FTO), and divided ACC patients into high-risk and low-risk groups following the cut-off of the median risk score.