We found that the AUC value of CLDN2, CLDN1, CLDN14, CLDN16, CLDN12, CLDN8, CLDN23, CLDN5, CLDN11, and CLDN7 is above 0.80, indicating that these claudins have strong diagnostic value for colon cancer patients. Here, CLDN2 is linked to malignant colon neoplasm.