Further, it was found that the expression level of RCC1 was related to the tumor pathological stages of KIRP, LIHC, ACC, COAD, KICH, KIRC, PAAD, UCS, THCA and SKCM (Figure 3a, Supplementary Figure S2a, all p < 0.05). The gene discussed is RCC1; the disease is pancreatic adenocarcinoma.