GEPIA analysis comparing the gene expression level between PAAD tumor tissue and normal tissue showed that KIF4A, KIF7, and KIF21B were significantly upregulated in tumor tissue (P < .05), while the expression level for KIF4B, KIF21A, and KIF27 were not significantly different between tumor tissue and normal tissue (Figure 4). Here, KIF21B is linked to pancreatic adenocarcinoma.