ATAD2 overexpression was associated significantly with the expression of PD-L1, B7-H4, ALDH1, Slug, and CMTM6 proteins in oral squamous cell carcinoma (OSCC), suggesting that ATAD2 played an important function in the regulation of EMT, immunosuppression, and CSCs in OSCC [58]. The gene discussed is ATAD2; the disease is oral cavity squamous cell carcinoma.