CDKN2A and neoplasm: Firstly, using the relevant data of IHC in the HPA database, the key genes CDKN2A, MSLN, and CKMT2 were compared at the protein level, and it was found that CDKN2A and MSLN were significantly highly expressed in the tumor tissues (p < 0.001; p < 0.05; Figure 12A,B), which was consistent with our prediction.