Objective : to understand the expression of c-myc in the digestive system tumors and the relationship between c-myc and telomerase. Methods: the expression of c-myc were determined by immunohistochemical SP method in specimens of the digestive system tumors (67 cases) and in the benign ones (15 cases) . Meanwhile the analysis of data was made by F-test and correlation index. Results: all specimens showed various degrees of P 62c-myc staining; the expression of c-myc between tumor group and benign one h...