Whereas other studies found that SRC-GC were more often MUC2 [51, 59, 60, 65], TFF3 [60], or MUC5AC [61, 65] positive compared to other types of GC, Ilhan et al. [51] found no relationship of MUC1 expression and histological tumour type. Here, MUC5AC is linked to gastric cancer.