An analysis of the correlations between the expression of CDK6 and immune checkpoints such as SIGLEC15, IDO1, CD274 (PD-L1), HAVCR2, PDCD1 (PD-1), CTLA4, LAG3, and PDCD1LG2 (PD-1) shows that the expression of CDK6 in ACC is negatively correlated with the transcripts of most of the immune checkpoint genes, while it is positively correlated with most such genes in LGG. Here, IDO1 is linked to adrenal cortex carcinoma.