Based on the GEPIA database to test the relative expression of KGs mRNA, it was determined that our proposed KGs (CXCL8, CEMIP, MMP7, CA4, ADH1C, GUCA2A, GUCA2B, ZG16, CLCA4, MS4A12 and CLDN1) may be closely related to the occurrence and development of CRC (Fig. 5). This evidence concerns the gene GUCA2A and colorectal carcinoma.