Objective To explore the influence of apoptosis-related gene p53 and PTEN expression levels on grading and prognosis of gastric cancer.Methods Immunohistochemistry was applied to detect the expressions of P53 and PTEN in the cancer tissues and adjacent tissues from 72 patients with gastric cancer and in the normal tissue from 40 patients receiving operation not due to gastric cancer.The relationship of P53 protein and PTEN gene expression levels with the grade and prognosis of gastric cancer were analyzed.R...