The expression of HNF4alpha, slug and snail in primary tumors and their corresponding metastases. A) The number of the lesions with different staining intensity of HNF4alpha, Slug and Snail in the primary tumors and its metastases. B) The expression change of HNF4alpha, Slug and Snail in the metastases compared with their corresponding primary tumors, marking via the lines, showed the role of HNF4alpha, Slug and Snail in the metastases. C) The examples of the cases with increased HNF4alpha, decreased Slug and Snail expression in the metastases compared with their primary tumors were showed. In the normal tumor-adjacent tissue, the expression of HNF4alpha was mainly strong, while the expression of Slug and Snail was usually negative.