In the present study, we first analyzed the tumor and adjacent non-tumor tissues of the GC patient cohorts and the biopsy tissues of the FD patients to measure the relative mRNA expression of gastric (MUC1, MUC5AC, MUC6) and intestinal (MUC2, MUC4, MUC13) mucins. This evidence concerns the gene MUC6 and Fabry disease.