C1GALT1 and cancer: The aberrant expressions of C1GALT1, mucins, and truncated core 1 based structures (T antigen and Tn antigen) are commonly observed in a variety of human cancers (Fu et al. 2016; Hanson and Hollingsworth 2016; Jiang et al. 2018a, b; Xia et al. 2022).