FUT3 and gastric neoplasm: In addition to the study of the FUT3 gene in the process of intestinal diseases, there are also some studies focusing on the effect of FUT3 on tumor markers, analyzing 22 variants in the FUT gene, and several variants in FUT2, FUT3, FUT5, FUT6, and FUT7 are associated with the risk of intestinal and diffuse gastric cancer and, to a lesser extent, with cardia and non-cardia gastric cancer [21].