TFF1 and neoplasm: Among 7870 tumor samples with available TFF1 and MUC5AC data, 573 (7.3%) showed expression of both TFF1 and MUC5AC, 1391 (17.7%) showed expression of only TFF1, 325 (4.1%) showed expression of only MUC5AC, and 5581 (70.9%) showed expression of none of the two proteins (p < 0.0001).