Immunohistochemical study of expression of nm 23 and c-erbB-2 protein markers in primary tumor and metastases of colorectal adenocarcinoma showed that the incidence and expression of both protein markers in primary tumor tissue tended to increase after the appearance of liver metastases. Peculiarities of protein expression in tumor metastases in lymph nodes and liver and the possibility of using these markers as additional prognostic criteria in colorectal cancer are discussed.
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