Previous studies showed that there was a significantly positive correlation between ADRA2C expression level and most of the immune infiltration cell types in ACC, KICH, KIRC, OV, PCPG, and PRAD, and there was a significantly negative correlation between ADRA2C expression level and most of the immune infiltration cell types in LUAD-LUSC, LUSC, OSCC, STAD, and UVM (Figure 8G). Here, ADRA2C is linked to adrenal cortex carcinoma.