Glycan variants of MUC5AC such as Sialyl-Lewisa (SLea), Sialyl-Lewisx (SLex), STn, and Thomsen-Friedenreich (T) (STn/T/SLea/SLex-MUC5AC) have been associated with mucinous adenocarcinomas from the stomach, ampulla of Vater, colon, lung, breast & ovary [71]. This evidence concerns the gene MUC5AC and mucinous adenocarcinoma.