We found a significantly varying abundance of immune cell subsets across tumor types (Fig. 2A), which was largely due to significantly elevated levels of CD4+ T cells (p = 0.03), CD8+ T cells (p = 0.04), other CD4+ cells (p = 0.03), and unclassified immune cells (p = 0.04) in ACC. Here, CD4 is linked to adrenal cortex carcinoma.